Double-cylinder multi-station boosting forming die

Abstract

The invention relates to the technical field of epoxy resin injection molding, in particular to a double-cylinder multi-station power-assisted forming mold which comprises a mold, a back plate and an automatic demolding assembly, the automatic demolding assembly comprises a first driving system, a second driving system, an inserting rod, a mold head and an inserting plate, and the inserting plate is located below the inserting rod and connected with the driving end of the first driving system; the front surface of the plugboard is contacted with the die head; a locking groove is formed in the inserting rod, the die head penetrates through the locking groove to abut against the front face of the inserting plate, the front face of the inserting plate is of an inclined face structure, and the die head is located at the bottom of the inclined face of the inserting plate during locking. Locking and demolding of the mold are achieved through the automatic demolding assembly, the inserting plate is designed to be the inclined face and achieves automatic demolding together with the fixed mold back plate and the mold head, the first driving system drives the inserting plate to move downwards, the mold head is ejected out of the back plate under the action of the inclined face, and therefore automatic demolding is achieved. Meanwhile, a second driving system is designed to insert and retreat from an insertion rod, and the mold head and the back plate are connected through the insertion rod.

Description

Technical Field

[0001] The invention relates to the technical field of epoxy resin injection molding, in particular to a double-cylinder multi-station power-assisted molding die. Background Art

[0002] In the existing field of epoxy resin injection molding technology, the injection molding mold adopts a two-cavity structure, and the material is injected and molded at one time to complete the production and processing of two products, which has low production efficiency. The mold injection port structure is semicircular, and there is a lot of residual material after injection molding. It is necessary to increase the injection head grinding process. The process is increased, the production efficiency is reduced, and the product appearance quality is affected. In addition, the mold plug rod and the die head are locked by the inclined width of the mold plug rod. The locking position is manually controlled, and there are differences in each locking position, and the mold positioning accuracy is low. The mold is demolded by inserting the plug rod in reverse and knocking the plug rod. The demolding efficiency is low and the labor intensity is high. Summary of the invention

[0003] In view of the problem in the prior art that product quality is affected by low mold positioning accuracy during injection molding, the present invention provides a double-cylinder multi-station power-assisted molding mold.

[0004] The present invention is achieved through the following technical solutions: A double-cylinder multi-station power-assisted forming mold, comprising a mold, a back plate and an automatic demoulding assembly, wherein the mold is detachably connected to the back plate through the automatic demoulding assembly, and the automatic demoulding assembly comprises a first driving system, a second driving system, an insert rod, a die head and an insert plate, wherein the insert rod and the insert plate are both slidably arranged on the back plate, and the sliding axes of the insert rod and the insert plate are perpendicular; the insert plate is located below the insert rod, the insert plate is connected to the driving end of the first driving system, and the front side of the insert plate contacts the die head; The insertion rod is connected to the driving end of the second driving system, and the second driving system drives the insertion rod to move horizontally; a locking groove is set on the insertion rod, one end of the die head is connected to the mold, and the other end passes through the locking groove and abuts against the front of the insertion plate, and the front of the insertion plate is an inclined structure. When locked, the die head is located at the bottom of the inclined surface of the insertion plate.

[0005] Preferably, the locking groove includes a connected circular groove and a strip groove, and the strip groove is located on the outside of the circular groove; when the second drive system drives the insertion rod to be inserted, the die head is located in the strip groove and the die head is locked; when the second drive system drives the insertion rod to be withdrawn, the die head is located in the circular groove and the die head is loosened.

[0006] Preferably, the mold includes a detachably connected upper mold plate, a movable mold and a fixed mold, the fixed mold is connected to the die head, a plurality of molding cavities with top openings are formed between the movable mold and the fixed mold, the upper mold plate is arranged at the opening of the molding cavity, an inner cavity mold corresponding to the molding cavity is arranged on the upper mold plate, and the inner cavity mold is located in the molding cavity; an injection guide groove is arranged at the lower end of the fixed mold cavity of the fixed mold, and the injection guide groove is connected to the molding cavity; the back of the fixed mold is connected to the back plate.

[0007] Preferably, the inner cavity mold includes a core pull and a sealing ring, the core pull is connected to the tile in the molding cavity, and the sealing ring is sleeved on the core pull.

[0008] Preferably, the number of the molding cavities is an even number, a plurality of injection guide grooves are provided, and two molding cavities share one injection guide groove.

[0009] Preferably, the injection guide groove includes an inlet groove and two reserved grooves, the length axis of the inlet groove is not parallel to the length axis of the reserved groove, one end of the inlet groove is a feed port, and the other end is connected to the reserved groove, and the end of the reserved groove away from the inlet groove is connected to the molding cavity.

[0010] Preferably, an injection port is provided between the reserved groove and the molding cavity for communication.

[0011] Preferably, the injection port is in the shape of an elongated strip.

[0012] Preferably, a gate insulation strip made of polytetrafluoroethylene material is provided in the injection guide groove. When in use, part of the gate insulation block is located in the introduction groove, and part of it is located in the reserved groove.

[0013] Preferably, a full-circle sealing groove is provided on the parting surface between the movable mold and the fixed mold.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a dual-cylinder multi-station power-assisted forming mold that realizes the locking and demolding of the mold through an automatic demolding assembly, wherein the insert plate is designed as an inclined surface, and realizes automatic demolding together with the fixed mold back plate and the die head. The first driving system drives the insert plate to move downward, and the die head is pushed out of the back plate under the action of the inclined surface, thereby realizing automatic demolding. At the same time, the second driving system is designed to insert and withdraw the insert rod, and the die head and the back plate are connected by the insert rod.

[0015] Furthermore, a locking groove of a "circular groove + strip groove" structure is designed on the insertion rod, which together with the fixed die back plate realizes the positioning of the die head. When the insertion rod is inserted, the die head enters the strip groove to achieve die head locking. When the insertion rod is withdrawn, the die head enters the circular groove to achieve die head loosening.

[0016] Furthermore, the movable mold, fixed mold and upper mold plate cooperate to ensure the appearance shape and size of the product. The core pulling is connected to the tile to ensure the inner cavity shape and size of the product. The molding cavity is designed as a multi-cavity structure to realize the injection molding of multiple products at one time, which helps to improve production efficiency.

[0017] Furthermore, the injection port is designed with a strip structure, so that after injection molding, there is less residual material at the injection port, which is easy to clean, and the process of grinding the injection head is eliminated, shortening the processing process.

[0018] Furthermore, the sealing ring is connected to the core puller to ensure that the epoxy resin mixture does not enter the arc extinguishing chamber during the injection molding process.

[0019] Furthermore, the gate insulation block is located in the guide groove to ensure the fluidity of the epoxy mixture in the guide groove. Furthermore, the entire sealing groove can ensure the sealing effect of the parting surface and avoid mold leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front schematic diagram of a fixed mold in a double-cylinder multi-station power-assisted forming mold of the present invention; Figure 2 It is a three-dimensional schematic diagram of a fixed mold in a double-cylinder multi-station power-assisted forming mold of the present invention; Figure 3 It is a three-dimensional schematic diagram of a movable mold in a double-cylinder multi-station power-assisted forming mold of the present invention; Figure 4 It is a three-dimensional schematic diagram of an upper mold plate in a double-cylinder multi-station power-assisted forming mold of the present invention; Figure 5 It is a schematic diagram of a demoulding component in a double-cylinder multi-station power-assisted forming mold of the present invention; Figure 6 It is a three-dimensional schematic diagram of a demoulding component in a double-cylinder multi-station power-assisted forming mold of the present invention.

[0021] In the figure, 1, movable mold; 2, fixed mold; 3, upper mold plate; 4, back plate; 5, plug rod; 6, plug plate; 7, movable mold cavity; 8, fixed mold cavity; 9, injection guide groove; 10, reserved groove; 11, first long groove; 12, die head; 13, locking groove; 14, injection port; 15, core pulling; 16, second long groove. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0026] The present invention discloses a double-cylinder multi-station power-assisted forming die, referring to Figure 1 , 2 , 3, 4, including a mold, a back plate 4 and an automatic demoulding component, wherein the mold includes a detachably connected upper mold plate 3, a movable mold 1 and a fixed mold 2. The mold material is P20 structural steel with good corrosion resistance and dimensional stability, and the inner cavity is nitrided to improve the mold hardness. The parting surface between the movable mold 1 and the fixed mold 2 is provided with a full circle of sealing grooves to increase the reliability of the mold sealing and avoid mold leakage.

[0027] A plurality of molding cavities with top openings are formed between the movable mold 1 and the fixed mold 2. Specifically, a plurality of movable mold 1 cavities are provided on the movable mold 1, and a plurality of fixed mold cavities 2 are provided on the front of the fixed mold 2. The fixed mold cavities 2 correspond to the movable mold 1 cavities one by one, and one movable mold 1 cavity and one fixed mold cavity 2 form a molding cavity with top openings. The upper mold plate 3 is arranged at the opening of the molding cavity, and an inner cavity mold corresponding to the molding cavity is arranged on the upper mold plate 3. The inner cavity mold is located in the molding cavity, and the inner cavity mold includes a core puller 15 and a sealing ring. The core puller 15 is connected to the tile in the molding cavity, and the sealing ring is sleeved on the core puller 15.

[0028] The lower end of the fixed mold cavity 2 of the fixed mold 2 is provided with an injection guide groove 9, and the injection guide groove 9 is connected to the molding cavity; the number of molding cavities is an even number, and multiple injection guide grooves 9 are provided, and two molding cavities share one injection guide groove 9. In this embodiment, the mold is an inverted structure, and side injection is performed. There are four molding cavities, and the injection guide grooves 9 are designed to be two, that is, two "Y"-shaped injection guide grooves 9 are designed at the lower end of the fixed mold 2, that is, one injection guide groove 9 is responsible for the injection of two-cavity products, and the processing of four products is completed by one injection molding, which greatly improves the production efficiency.

[0029] The injection guide groove 9 includes an inlet groove and two reserved grooves 10. The length axis of the inlet groove is not parallel to the length axis of the reserved groove 10. One end of the inlet groove is a feed port, and the other end is connected to the reserved groove 10. The end of the reserved groove 10 away from the inlet groove is connected to the molding cavity.

[0030] The injection guide groove 9 is provided with a gate insulation strip made of polytetrafluoroethylene material. When in use, part of the gate insulation block is located in the introduction groove, and part is located in the reserved groove 10. This is because the injection guide groove 9 is designed to be long for the product of the two-cavity mold on one side, and the epoxy mixture is easy to solidify in the injection guide groove 9. A "7" type gate insulation block is designed, and the insulation block is made of polytetrafluoroethylene material with good thermal insulation performance, which effectively prevents heat loss and solidification of the epoxy mixture in the injection guide groove 9.

[0031] A long strip-shaped injection port 14 is provided between the reserved groove 10 and the molding cavity for communication. In this embodiment, the injection port 14 is designed to be 35mm*0.8mm in size, and less residual material is left after the solid sealing molding, which can be easily removed without adding a step for polishing the injection head, thereby reducing processing costs and improving processing efficiency.

[0032] The mold is detachably connected to the back plate 4 through an automatic demoulding component, that is, the back of the fixed mold 2 is connected to the back plate 4 through an automatic demoulding component, refer to Figure 5 , 6 The automatic demoulding assembly includes a first driving system, a second driving system, an insert rod 5, a die head 12 and an insert plate 6. The insert rod 5 and the insert plate 6 are both slidably arranged on the back plate 4. The sliding axes of the insert rod 5 and the insert plate 6 are perpendicular. The insert plate 6 is located below the insert rod 5. In this embodiment, a plurality of first long grooves 11 and a plurality of second long grooves 16 are provided on the back plate 4. The first long grooves 11 and the second long grooves 16 are perpendicular to each other, and the depth of the first long grooves 11 is greater than the depth of the second long grooves 16. The insert plate 6 slides in the first long grooves 11, and the insert rod 5 slides in the second long grooves 16.

[0033] The plug plate 6 is connected to the driving end of the first driving system, and the front of the plug plate 6 contacts the die head 12. The plug rod 5 is connected to the driving end of the second driving system, and the second driving system drives the plug rod 5 to move horizontally; a locking groove 13 is provided on the plug rod 5, one end of the die head 12 is connected to the fixed mold, and the other end passes through the locking groove 13 and abuts against the front of the plug plate 6, and the front of the plug plate 6 is an inclined structure. When locked, the die head 12 is located at the bottom of the inclined surface of the plug plate 6. In this embodiment, a wire outlet insert and a wire outlet locking block are provided at one end of the die head 12 away from the plug plate 6 and connected to the fixed mold. The wire outlet insert and the wire outlet locking block are detachably connected through a threaded structure or a groove and protrusion structure. The wire outlet insert and the wire outlet locking block are for connecting with the lower outlet wire, and can also ensure that the epoxy resin mixture does not enter the threaded hole of the lower outlet wire during the injection molding process. When the locking action occurs, the die head 12 is located at the bottom of the inclined surface structure of the plug plate 6. The die head 12 is firmly locked through the support and guidance of the inclined surface. The first driving system is an epoxy resin APG device, and the plug plate 6 is connected to the device. The epoxy resin APG device drives the plug plate 6 to move downward, and the die head 12 is gradually ejected from the inclined surface of the plug plate 6, thereby realizing automatic demoulding. In order to facilitate ejection, the end of the die head 12 that contacts the plug plate 6 is arc-shaped, so as to reduce the friction and resistance when the two contact, making the demoulding process smoother and unobstructed.

[0034] The locking groove 13 includes a circular groove and a strip groove that are connected, and the strip groove is located on the outside of the circular groove; when the second drive system drives the insertion rod 5 to be inserted, the die head 12 is located in the strip groove and the die head 12 is locked; when the second drive system drives the insertion rod 5 to be withdrawn, the die head 12 is located in the circular groove and the die head 12 is loosened. In this embodiment, the second drive system is a hydraulic system. In order to improve production efficiency, the hydraulic system drives the two insertion rods 5 to be inserted and withdrawn at the same time. Structurally, the two insertion rods 5 together form a positioning fork, and a positioning fork controls the die heads 12 of the two molds for positioning. In addition, the positioning fork is driven by the hydraulic system to ensure that the positioning fork is in a certain position, so as to realize planar hydraulic drive positioning and improve positioning accuracy.

[0035] The present invention discloses a double-cylinder multi-station assisted forming mold with a one-mold four-cavity structure. An injection guide groove 9 is responsible for the injection molding of two products. The injection port 14 is designed to be long and narrow, and the injection head grinding process is eliminated. A polytetrafluoroethylene insulation block is designed in the injection guide groove 9 to ensure the fluidity of the epoxy mixture in the guide groove. The insertion rod is driven by the second drive system and cooperates with the locking groove of the "circular groove + strip groove" structure to realize planar hydraulic drive positioning, thereby improving the positioning accuracy of the mold. The insertion plate 6 is designed to be an inclined surface and is connected to the first drive system. When demolding, the first drive system drives the insertion plate 6 to move downward and eject the die head 12 to realize automatic demolding.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A dual-cylinder multi-station power-assisted forming die, characterized in that: The invention comprises a mold, a back plate (4) and an automatic demoulding component, wherein the mold is detachably connected to the back plate (4) through the automatic demoulding component, and the automatic demoulding component comprises a first driving system, a second driving system, an insert rod (5), a die head (12) and an insert plate (6), wherein the insert rod (5) and the insert plate (6) are both slidably arranged on the back plate (4), and the sliding axes of the insert rod (5) and the insert plate (6) are perpendicular; the insert plate (6) is located below the insert rod (5), the insert plate (6) is connected to the driving end of the first driving system, and the front side of the insert plate (6) contacts the die head (12); The insertion rod (5) is connected to the driving end of the second driving system, and the second driving system drives the insertion rod (5) to move horizontally; a locking groove (13) is provided on the insertion rod (5); one end of the die head (12) is connected to the mold, and the other end passes through the locking groove (13) and abuts against the front of the insertion plate (6); and the front of the insertion plate (6) is an inclined surface structure. When locked, the die head (12) is located at the bottom of the inclined surface of the insertion plate (6).

2. The double-cylinder multi-station power-assisted forming die according to claim 1 is characterized in that: The locking groove (13) comprises a circular groove and a strip groove which are connected, and the strip groove is located outside the circular groove; when the second driving system drives the insertion rod (5) to be inserted, the die head (12) is located in the strip groove and the die head (12) is locked; when the second driving system drives the insertion rod (5) to be withdrawn, the die head (12) is located in the circular groove and the die head (12) is loosened.

3. The double-cylinder multi-station power-assisted forming die according to claim 1 is characterized in that: The mold comprises a detachably connected upper mold plate (3), a movable mold (1) and a fixed mold (2); the fixed mold (2) is connected to a die head (12); a plurality of molding cavities with top openings are formed between the movable mold (1) and the fixed mold (2); the upper mold plate (3) is arranged at the opening of the molding cavity; an inner cavity mold corresponding to the molding cavity is arranged on the upper mold plate (3); the inner cavity mold is located in the molding cavity; an injection guide groove (9) is arranged at the lower end of the fixed mold cavity (2) of the fixed mold (2); the injection guide groove (9) is connected to the molding cavity; and the back of the fixed mold (2) is connected to a back plate (4).

4. The double-cylinder multi-station power-assisted forming die according to claim 3 is characterized in that: The inner cavity mold comprises a core puller (15) and a sealing ring. The core puller (15) is connected to the tile in the molding cavity, and the sealing ring is sleeved on the core puller (15).

5. The double-cylinder multi-station power-assisted forming die according to claim 3 is characterized in that: The number of the forming cavities is an even number, a plurality of injection guide grooves (9) are provided, and two forming cavities share one injection guide groove (9).

6. The double-cylinder multi-station power-assisted forming die according to claim 3 is characterized in that: The injection guide groove (9) comprises an inlet groove and two reserved grooves (10); the length axis of the inlet groove is not parallel to the length axis of the reserved groove (10); one end of the inlet groove is a feed port, and the other end is connected to the reserved groove (10); and the end of the reserved groove (10) away from the inlet groove is connected to the molding cavity.

7. The double-cylinder multi-station power-assisted forming die according to claim 6, characterized in that: An injection port (14) is provided between the reserved groove (10) and the molding cavity for communication.

8. The double-cylinder multi-station power-assisted forming die according to claim 7 is characterized in that: The injection port (14) is in the shape of an elongated strip.

9. The double-cylinder multi-station power-assisted forming die according to claim 3, characterized in that: A gate heat insulation strip made of polytetrafluoroethylene material is arranged in the injection guide groove (9). When in use, part of the gate heat insulation block is located in the introduction groove, and part of the gate heat insulation block is located in the reserved groove (10).

10. The double-cylinder multi-station power-assisted forming die according to claim 3, characterized in that: A full-circle sealing groove is provided on the parting surface between the movable mold (1) and the fixed mold (2).

Images