Reverse buckling plane mold

Abstract

The invention discloses a reverse buckling plane die which comprises a workbench, an upper die, a lower die and other components. The lower die is provided with a die cavity, guide rods are arranged on two sides of the lower die, the upper die is provided with sliding sleeves matched with the guide rods, and ejector rods are inserted into the top of the upper die and extend to the die cavity. A linkage ejection assembly is arranged at the top of the guide rod and comprises a transverse sliding column, a one-way pressing block, a rotating rod, a torsion spring, a connecting rod, a connecting rod and the like, the one-way pressing block is matched with the inclined face portion of the connecting rod, the ejection rod is sleeved with a compression spring, and the connecting rod is provided with an ejection baffle and a positioning column. The pressure adjusting assembly is composed of a pressure adjusting spring, a sleeve, a screw rod, a nut, a mounting frame and the like, and an adjusting button is arranged at the end of the screw rod. According to the mold, the cylinder drives the lower mold to move up and down to open and close the mold, and liquid can be injected into the mold cavity through the injection port to form a product after mold closing. During mold splitting, the ejection assembly is linked to enable the ejection rod to eject a product, the pressure adjusting assembly can adjust the ejection pressure according to the material of the product, the situation that the product adheres to the upper mold and falls off to be damaged is effectively avoided, and the product quality and the mold universality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, in particular to an inverted flat mould. Background Art

[0002] In modern manufacturing, molds are key process equipment for achieving efficient and precise molding of products. Whether in automobiles, electronics, home appliances, aerospace and many other fields, molds are widely used, which directly affects product quality, production efficiency and manufacturing costs. However, in the use of molds, especially in the mold separation stage, there have always been many problems that need to be solved. When traditional molds are separated, the product often sticks to the mold cavity, which seriously affects the continuity of production and the yield rate of products.

[0003] Many existing molds lack effective demoulding assistance mechanisms in their designs. After the product is molded in the mold cavity, due to the combined influence of factors such as material characteristics, molding process parameters, and mold surface roughness, the product tends to be tightly adsorbed to a certain part of the mold, especially the upper mold. During the mold separation process, this adsorption force may cause the product to be unable to be demolded smoothly, but to move away from its original molding position as the upper mold moves. Once the product falls from the upper mold, due to the lack of effective buffering and protection measures, it is very easy to collide with other parts of the mold, the work surface or the surrounding environment, resulting in surface defects such as bumps and scratches, and may even cause damage to the internal structure of the product, seriously reducing the quality and performance of the product, and increasing the scrap rate and production costs.

[0004] With the continuous improvement of product quality requirements and the urgent need to improve production efficiency in the manufacturing industry, it is imperative to develop a new mold technology that can effectively solve the problems of product adhesion and falling during mold separation. This new mold must not only ensure the smooth demolding of the product during the mold separation process, but also be able to adapt to the characteristics of products of different materials and provide adjustable demolding force to avoid damage to the product caused by excessive or insufficient demolding force. In addition, while ensuring the above functions, the mold structure should be simplified as much as possible, the manufacturing cost should be reduced, and the overall reliability and service life of the mold should be improved, thereby providing companies with more advantageous production solutions in the fierce market competition. Summary of the invention

[0005] The present invention aims to provide an inverted flat mold to solve the problem that products are easily adhered to the upper mold and fall and get damaged during mold separation in the existing mold, while achieving adjustable ejection pressure to meet the demoulding requirements of products made of different materials and improve the versatility of the mold and product quality.

[0006] Overall structure of mold The mold is mainly composed of components such as a workbench, a gantry, a suspension rod, an upper mold, a lower mold, guide rods, sliding sleeves, sliding rods, a filling port, a mold cavity, a cylinder, and ejector rods. The workbench serves as the support foundation for the entire mold, and the cylinders installed at the bottom are used to drive the up and down movement of the lower mold to achieve the opening and closing actions of the mold. The gantry is fixed to the top of the workbench and is connected to the upper mold through a suspension rod, providing a stable support structure for the upper mold.

[0007] A mold cavity is opened at the center of the top of the lower mold for product forming. The sliding rods provided on both sides of the lower mold are slidably engaged with the inner walls on both sides of the gantry to ensure the stability and linearity of the lower mold during the up and down movement. Two guide rods are also vertically provided on both sides of the lower mold. A linkage ejection assembly is provided at the top of the guide rods to control the movement of the ejector rods and achieve the ejection and demolding of the product.

[0008] Two sliding sleeves are provided on both sides of the upper mold near the guide rods, which are adapted to the guide rods, enabling the upper mold to be accurately positioned along the guide rods during the mold closing process with the lower mold. Two ejector rods are slidably inserted into both sides of the top of the upper mold. The ejector rods can slide and extend into the mold cavity. And a filling port is provided at the center of the top of the upper mold to facilitate the filling of materials such as liquid into the mold cavity during the forming process.

[0009] Linkage ejection assembly The linkage ejection assembly includes a transverse sliding column slidably inserted at the top of the guide rod. A one-way pressing block is provided at the bottom of one end of the transverse sliding column close to the upper mold. A rotating rod is horizontally inserted at the end of the one-way pressing block. Torsion springs are sleeved on the outer peripheral surfaces of both ends of the rotating rod. Connecting rods are installed at both ends of the rotating rod, and the connecting rods are fixed to both sides of the adjacent transverse sliding column. An extrusion inclined surface is provided at the end of the one-way pressing block. A connecting rod is connected to one side of the extrusion inclined surface. The bottom of the end of the connecting rod away from the extrusion inclined surface is connected to the top end of the ejector rod. A pressed inclined surface adapted to the extrusion inclined surface is provided at the end of the connecting rod.

[0010] A compression spring is sleeved on the outer peripheral surface of the ejector rod at the position between the bottom of the connecting rod close to the ejector rod and the top of the upper mold. A top baffle is provided at the top of the end of the connecting rod close to the ejector rod. The top baffle is used to limit the height position of the ejector rod to prevent the ejector rod from protruding excessively in the non-ejection state. Positioning columns are vertically slidably inserted into the connecting rods, and the positioning columns are fixed to the top of the upper mold, playing a role in positioning and guiding the movement of the connecting rods to ensure their stable movement in the vertical direction.

[0011] Pressure regulating assembly The pressure regulating assembly works in coordination with the linkage ejection assembly to control the pressure of the ejector rod. It includes a pressure regulating spring horizontally provided at the end of the transverse sliding column away from the one-way pressing block. A sleeve is sleeved at the end of the pressure regulating spring. Screws are coaxially provided at the ends of the sleeve. Nuts are threadedly sleeved on the screws. The nuts are fixedly connected with mounting brackets, and the mounting brackets are respectively fixed to the outer walls of the upper parts of the guide rods. The screws respectively slide through the mounting brackets.

[0012] Adjusting knobs are coaxially provided at the ends of the screw rods. By rotating the adjusting knobs, the relative position of the screw rods in the nuts can be changed, thereby adjusting the compression degree of the pressure-regulating spring. At the top of the end of the transverse sliding column away from the one-way pressing block, limiting blocks are vertically provided. The limiting blocks are in contact with the outer peripheral surface of the guide rod, and are used to limit the transverse sliding range of the transverse sliding column, ensuring the stability and reliability of the pressure-regulating assembly and the linkage ejecting assembly during the working process.

[0013] During mold closing, the air cylinder drives the lower mold to move upward. The guide rod slides upward in the sliding sleeve. The one-way pressing block contacts the connecting rod and rotates downward under the action of the mold closing force. The torsion spring is compressed. After the mold closing is completed, the one-way pressing block resets.

[0014] During the molding process, according to process requirements, materials such as liquid can be injected into the mold cavity through the injection port, and then molding operations such as heating and pressurization are carried out.

[0015] During mold opening, the air cylinder drives the lower mold to move downward. The downward movement of the guide rod causes the transverse sliding column to drive the one-way pressing block to squeeze the connecting rod. Since the one-way pressing block is blocked by the transverse sliding column and cannot rotate, the pressure is transmitted to make the connecting rod drive the ejector rod to eject the product downward against the elastic force of the compression spring, realizing demolding. After demolding, the connecting rod is separated from the one-way pressing block. The pressure-regulating spring makes the transverse sliding column reset, and the compression spring makes the ejector rod reset.

[0016] Advantageous effects: With the unique design of the linkage ejecting assembly, the product can be ejected in a timely and effective manner during mold opening, avoiding the product adhering to the upper mold and causing dropping and bruising. Through the ingenious cooperation between the one-way pressing block, the connecting rod and the ejector rod, the automatic ejection of the product is realized by using the power generated by the mold opening and closing actions, without the need for additional complex driving devices.

[0017] The pressure-regulating assembly can flexibly adjust the ejection pressure of the ejector rod according to the characteristics of products made of different materials, improving the adaptability of the mold to a variety of products. By simply rotating the adjusting knob, the compression degree of the pressure-regulating spring can be changed, thereby precisely controlling the ejection pressure, which can not only ensure the smooth demolding of the product, but also prevent the product from being damaged due to excessive ejection pressure, effectively improving the product quality and production efficiency.

[0018] In summary, through the innovative structural design and reasonable cooperation of components of the reverse buckle flat mold of the present invention, the problems of product adhesion and bruising in the mold opening process of the existing mold are effectively solved, and it has the advantage of adjustable ejection pressure, showing significant progressiveness and practical value in the field of mold technology. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the attached drawings required in the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 Schematic diagram of the front view structure of an embodiment of the present invention; Figure 3 Schematic diagram of the upper mold and lower mold structures of an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the linkage ejection assembly of an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the pressure regulating assembly of an embodiment of the present invention; Figure 6 For an embodiment of the present invention Figure 4 Schematic diagram of the enlarged partial structure at location A; Figure 7 For an embodiment of the present invention Figure 5 Schematic diagram of the enlarged partial structure at location B.

[0021] The labels in the figure are: 1, workbench; 2, gantry; 3, suspension rod; 4, upper mold; 5, lower mold; 6, guide rod; 7, sliding sleeve; 8, sliding rod; 9, filling port; 10, mold cavity; 11, air cylinder; 12, ejector rod; 13, compression spring; 14, top baffle; 15, connecting rod; 151, pressure-receiving inclined surface; 16, positioning column; 17, transverse sliding column; 18, one-way pressing block; 181, extrusion inclined surface; 19, rotating rod; 20, torsion spring; 21, connecting rod; 22, pressure-regulating spring; 23, sleeve; 24, mounting bracket; 25, screw; 26, nut; 27, adjustment knob; 28, limit stop block. Detailed implementation manners

[0022] The following will describe the present invention in detail with reference to the attached drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the attached drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that in the specification, the mention of "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicates that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining an embodiment to describe a specific feature, structure or characteristic, implementing such feature, structure or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge scope of those skilled in the relevant art.

[0024] Generally, terms can be understood at least in part from their use in the context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, allowing for the existence of other factors that may not be explicitly described.

[0025] Embodiment 1 Refer to Figures 1 to 7 I. Overall Installation and Initial Preparation of the Mold First, place the workbench 1 on a stable working plane to ensure that its levelness meets the requirements. Install two cylinders 11 at the bottom of the workbench 1, and firmly connect the top output ends of the cylinders 11 to the bottom of the lower mold 5. Install a gantry 2 on the top of the workbench 1, and reliably connect the four suspension rods 3 on the inner wall of the top of the gantry 2 to the four corners at the top of the upper mold 4.

[0026] Slide the slide rods 8 on both sides of the lower mold 5 respectively into the inner walls on both sides of the gantry 2, ensuring that the slide rods 8 can smoothly slide up and down within the gantry 2, while guiding the movement of the lower mold 5. Check the mold cavity 10 opened at the center of the top of the lower mold 5 to ensure that its inner surface is smooth, free of debris and damage, so as to ensure the product forming quality.

[0027] II. Installation and Debugging of the Linkage Ejection Assembly and the Pressure Regulation Assembly Linkage Ejection Assembly Horizontally slide the cross slide post 17 into the top of the guide rod 6, install a one-way pressure block 18 at the bottom of the cross slide post 17 near the upper mold 4, horizontally insert a rotating rod 19 at the end of the one-way pressure block 18, sleeved torsion springs 20 on the outer peripheral surfaces at both ends of the rotating rod 19, and then install the connecting rod 21 at both ends of the rotating rod 19 and fix it on both sides of the adjacent cross slide posts 17.

[0028] An extrusion inclined surface portion 181 is provided at the end of the unidirectional pressing block 18. One end of the connecting rod 15 is connected to one side of the extrusion inclined surface portion 181, and the bottom of the other end of the connecting rod 15 is connected to the top end of the ejector rod 12. A pressed inclined surface portion 151 adapted to the extrusion inclined surface portion 181 is provided at the end of the connecting rod 15. A compression spring 13 is sleeved on the outer peripheral surface of the ejector rod 12 at a position between the bottom of the connecting rod 15 and the top of the upper die 4. A top baffle 14 is installed at the top of one end of the connecting rod 15 close to the ejector rod 12. The top baffle 14 is used to limit the height position of the ejector rod 12. At the same time, the connecting rod 15 is vertically slidably inserted into the positioning column 16, and the positioning column 16 is fixed to the top of the upper die 4.

[0029] Pressure regulating assembly A pressure regulating spring 22 is transversely provided at one end of the cross-sliding column 17 away from the unidirectional pressing block 18. The end of the pressure regulating spring 22 is sleeved into the sleeve 23. A screw rod 25 is coaxially installed at the end of the sleeve 23. The screw rod 25 is threadedly sleeved with a nut 26. The nut 26 is fixedly connected to the mounting bracket 24, and the mounting bracket 24 is fixed to the outer wall of the upper part of the guide rod 6, ensuring that the screw rod 25 can slide through the mounting bracket 24. An adjusting knob 27 is coaxially installed at the end of the screw rod 25 for subsequent adjustment of the compression degree of the pressure regulating spring 22. A limit stop block 28 is vertically installed at the top of one end of the cross-sliding column 17 away from the unidirectional pressing block 18, so that the limit stop block 28 abuts against the outer peripheral surface of the guide rod 6 to limit the lateral sliding range of the cross-sliding column 17.

[0030] After installation, the linkage ejection assembly and the pressure regulating assembly are debugged. By rotating the adjusting knob 27, observe the position change of the cross-sliding column 17 under different compression degrees of the pressure regulating spring 22, and the movement of the ejector rod 12 driven by the connecting rod 15, ensure that the cooperation between each component is smooth, the ejection pressure can change accordingly with the adjustment of the pressure regulating spring 22, and there will be no abnormal situations such as jamming and interference during the whole movement process.

[0031] III. Mold working process Clamping operation Start the cylinder 11, so that the piston rod of the cylinder 11 extends, driving the lower die 5 to move upward. The sliding rods 8 on both sides of the lower die 5 slide upward on the inner walls of both sides of the gantry 2, playing a guiding role to ensure that the lower die 5 rises vertically. At the same time, the guide rods 6 on both sides of the lower die 5 slide upward in the sliding sleeves 7 connected to the upper die 4. During the clamping process, the extrusion inclined surface portion 181 at the end of the unidirectional pressing block 18 gradually contacts and squeezes the pressed inclined surface portion 151 at the end of the connecting rod 15. Due to the action of the clamping force, the unidirectional pressing block 18 will rotate downward around the rotating rod 19, and the torsion spring 20 is compressed. With the completion of the clamping action, the unidirectional pressing block 18 is separated from the connecting rod 15, and under the restoring force of the torsion spring 20, the unidirectional pressing block 18 rotates back to its original position.

[0032] Forming operation In the mold-closed state, according to the production process requirements of the product, if it is necessary to inject liquid material into the mold cavity 10, an appropriate amount of liquid is injected into the mold cavity 10 through the injection port 9 at the center of the top of the upper mold 4. Then, according to the molding conditions of the product, such as temperature, pressure, time, etc., the mold is subjected to corresponding heating, pressurization, etc. to form the material in the mold cavity 10 into the required product shape.

[0033] Mold opening and ejection operations After the molding is completed, the piston rod of the air cylinder 11 retracts, driving the lower mold 5 to move downward for mold opening operation. At this time, the guide rod 6 also moves downward, and the cross slide column 17 also moves accordingly. The extrusion inclined surface 181 at the end of the one-way pressing block 18 contacts and applies pressure to the pressed inclined surface 151 at the end of the connecting rod 15 again. Since the one-way pressing block 18 is blocked by the end of the cross slide column 17 and cannot rotate downward, it can only transfer the pressure to the connecting rod 15. The connecting rod 15 moves downward under the action of the pressure, overcoming the elastic force of the compression spring 13, driving the ejector rod 12 to extend downward into the interior of the mold cavity 10, applying an upward ejection force to the molded product, and separating the product from the mold cavity 10. During the ejection process, the reaction force generated when the pressed inclined surface 151 is pressed will cause the cross slide column 17 to slide horizontally, but due to the limitation of the limit stop block 28, the cross slide column 17 can only slide within a certain range. When the ejection action is completed and the connecting rod 15 is separated from the one-way pressing block 18, the elastic force of the pressure regulating spring 22 causes the cross slide column 17 to quickly reset, and at the same time, the elastic force of the compression spring 13 causes the ejector rod 12 to also quickly reset, preparing for the next mold cycle operation.

[0034] During the entire use process of the mold, according to the material and shape characteristics of different products, the compression stroke of the pressure regulating spring 22 can be changed by adjusting the adjusting knob 27 in the pressure regulating component, so as to adjust the ejection pressure output by the ejector rod 12, ensuring that the product can be smoothly demolded during the ejection process without causing damage such as pressing damage to the product, and improving the production quality and production efficiency of the product.

[0035] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the essence and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, well-known methods, processes, flows, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An inverted flat mold, comprising an upper mold (4), a lower mold (5) and a workbench (1), wherein a mold cavity (10) is opened at the center of the top of the lower mold (5), two guide rods (6) are vertically arranged on both sides of the lower mold (5), two sliding sleeves (7) for matching with the guide rods (6) are arranged on both sides of the upper mold (4) close to the guide rods (6), two ejector rods (12) are slidably inserted on both sides of the top of the upper mold (4), and the ejector rods (12) are slidably extended into the mold cavity (10), and a linkage ejection assembly for controlling the movement of the ejector rods (12) is arranged on the top of the guide rods (6), characterized in that: The linkage ejection assembly comprises a transverse sliding column (17) which is laterally slidably inserted on the top of the guide rod (6); a one-way pressure block (18) is provided at the bottom of one end of the transverse sliding column (17) close to the upper mold (4); a rotating rod (19) is laterally inserted at the end of the one-way pressure block (18); a torsion spring (20) is sleeved on the outer circumference of both ends of the rotating rod (19); connecting rods (21) are installed at both ends of the rotating rod (19); the connecting rods (21) are fixed on both sides of adjacent transverse sliding columns (17); an extrusion inclined portion (181) is provided at the end of the one-way pressure block (18); a connecting rod (15) is provided on one side of the extrusion inclined portion (181); and the connecting rod The bottom of one end of the connecting rod (15) away from the extrusion inclined portion (181) is respectively connected to the top of the push rod (12); the end of the connecting rod (15) is provided with a pressure inclined portion (151) adapted to the extrusion inclined portion (181); the outer circumference of the push rod (12) between the bottom of the connecting rod (15) and the top of the upper mold (4) is sleeved with a compression spring (13); the top of one end of the connecting rod (15) close to the push rod (12) is provided with a top baffle (14); the top baffle (14) is used to limit the height position of the push rod (12); and the end of the cross slide column (17) away from the one-way pressure block (18) is provided with a pressure regulating component for controlling the pressure of the push rod (12).

2. The inverted flat mold according to claim 1, characterized in that: The pressure regulating assembly comprises a pressure regulating spring (22) which is transversely arranged at one end of the transverse sliding column (17) away from the one-way pressure block (18); the end of the pressure regulating spring (22) is sleeved with a sleeve (23); the end of the sleeve (23) is coaxially provided with a screw (25); the screw (25) is threadedly sleeved with a nut (26); the nut (26) is fixedly connected with a mounting frame (24); the mounting frames (24) are respectively fixed to the upper outer wall of the guide rod (6); and the screws (25) are respectively slidably penetrated through the mounting frames (24).

3. The inverted flat mold according to claim 1, characterized in that: Two cylinders (11) are provided at the bottom of the workbench (1), and the top output ends of the cylinders (11) are connected to the bottom of the lower mold (5). A gantry (2) is provided at the top of the workbench (1), and four suspension rods (3) are provided on the inner wall of the top of the gantry (2), and are connected to the four corners of the top of the upper mold (4).

4. The inverted flat mold according to claim 1, characterized in that: A filling port (9) for filling liquid into the mold cavity (10) is provided at the top center of the upper mold (4).

5. The inverted flat mold according to claim 1, characterized in that: The lower mold (5) is provided with sliding rods (8) on both sides close to the gantry (2), and the sliding rods (8) are slidably embedded in the inner walls on both sides of the gantry (2).

6. The inverted flat mold according to claim 2, characterized in that: The ends of the screw rods (25) are coaxially provided with adjustment knobs (27).

7. The inverted flat mold according to claim 1, characterized in that: A limit stopper (28) is vertically provided at the top of one end of the transverse sliding column (17) away from the one-way pressure block (18), and the limit stopper (28) abuts against the outer peripheral surface of the guide rod (6).

8. The inverted flat mold according to claim 1, characterized in that: The connecting rods (15) are vertically slidably inserted with positioning columns (16), and the positioning columns (16) are fixed to the top of the upper mold (4).

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