A double insurance mold

Abstract

The present application discloses a double-safety mold, including an upper mold, a lower mold, a mold opening safety, a mold closing safety, a top plate, a side draw block and a draw rod, wherein the upper end of the draw rod is arranged on the top plate, and the lower end of the draw rod is provided with an inclined limit slide rail; the side draw block is slidably arranged in the upper mold, and a molding cavity is surrounded by the side draw block, the upper mold and the lower mold, and one end of the side draw block away from the molding cavity is slidably arranged in the limit slide rail; the top plate is movably arranged above the upper mold in the up-down direction, and the top plate can be moved up and down to force the side draw block to slide in and out of the molding cavity; the mold opening safety is arranged between the upper mold and the lower mold, and the mold closing safety is arranged between the top plate and the upper mold. It can simultaneously control all the side draw blocks to realize core pulling and core feeding by moving the top plate up and down, and the upper mold and the lower mold are locked by the mold opening safety before core pulling, and the core feeding is limited by the mold closing safety before mold closing, and it has a simple structure, reasonable layout, low cost, easy installation and operation, and less demand for cylinders.

Description

Technical Field

[0001] The present application relates to the field of molds, and in particular to a double-safety mold. Background Art

[0002] At present, injection molds are widely used in aviation, electronics, machinery, ships, automobiles and other fields. They mainly include an upper mold and a lower mold. A mold cavity is formed between the upper mold and the lower mold. A runner connected to the mold cavity is provided on the upper mold or the lower mold. Liquid raw materials are injected into the mold cavity through the runner, and after cooling and molding, products of specific shapes and sizes are formed.

[0003] However, for some products with complex shapes and structures, it is often difficult to meet the requirements using traditional upper and lower molds. Figure 1 As shown, an oil cover on a yacht engine (the oil cover is marked as 100 in the figure) needs to form a clearance hole (the clearance hole is marked as 101 in the figure) and multiple screw mounting holes (the screw mounting holes are marked as 102 in the figure) on the side during injection molding. Therefore, multiple side core pulling mechanisms need to be set up. Before opening the mold, the side core pulling mechanisms are first pulled out and then the demolding is completed.

[0004] In the prior art, each side core puller needs to be driven by a cylinder, and the core pulling directions of each side core puller are different. The assembly between the cylinder and the side core puller is difficult, and the control of the cylinder is cumbersome and the operation is complicated. In addition, the initial investment cost and the later maintenance cost are relatively high. Summary of the invention

[0005] One purpose of the present application is to provide a double insurance mold with a simple structure, reasonable layout, low cost, easy installation, easy operation, and less cylinder requirements.

[0006] Another object of the present application is to provide a mold opening insurance with a simple structure, reasonable layout, low cost, easy installation, and easy operation.

[0007] Another object of the present application is to provide a mold insurance with simple structure, reasonable layout, low cost, easy installation and easy operation.

[0008] To achieve the above objectives, the technical solution adopted in the present application is: a double-safety mold, comprising an upper mold, a lower mold, a mold opening safety, a mold closing safety, a top plate, a plurality of side draw blocks and a plurality of draw rods, the upper end of the draw rod being arranged on the top plate, and the lower end of the draw rod being provided with an inclined limit slide rail; the side draw block is slidably arranged in the upper mold, a molding cavity is surrounded by the side draw block, the upper mold and the lower mold, and one end of the side draw block away from the molding cavity is slidably arranged in the limit slide rail; the top plate is movably arranged above the upper mold in the up and down directions, and moving the top plate up and down can force the side draw block to slide in and out of the molding cavity; the mold opening safety is arranged between the upper mold and the lower mold, and before the side draw block slides out of the molding cavity, the separation of the upper mold and the lower mold is limited; the mold closing safety is arranged between the top plate and the upper mold, and before the upper mold and the lower mold are closed, the side draw block is limited to slide into the molding cavity.

[0009] Preferably, a first elastic member is provided between the top plate and the upper mold, and the first elastic member is used to force the top plate to separate from the upper mold. The advantage is that under the action of the first elastic member, downward pressure needs to be applied to the top plate to balance the elastic force of the first elastic member, thereby ensuring that the top plate is in a stationary state; therefore, before opening the mold, when the pressure applied to the top plate is removed or the top plate is moved upward, the first elastic member can limit the upper mold to move upward with the top plate, thereby ensuring that the mold opening operation is performed after the core pulling operation is completed.

[0010] Preferably, the first elastic member is a nitrogen spring. The advantages are: the nitrogen spring is small in size, large in elastic force, long in stroke, stable in operation, long in service life, flat in elastic force curve, and does not require pre-tightening, etc. It can perform tasks that are difficult to accomplish with conventional elastic components such as metal springs, rubber and air cushions, thus simplifying mold design and manufacturing, facilitating mold installation and adjustment, extending mold service life, and ensuring stable product quality.

[0011] Preferably, a positioning slide bar is provided on the lower end surface of the top plate, a positioning slide hole is provided on the upper surface of the upper die, and the positioning slide bar is slidably connected in the positioning slide hole. The advantage is that the sliding cooperation between the positioning slide bar and the positioning slide hole can avoid the reduction of the precision and stability of the movement of the top plate due to the installation error of the first elastic member or the horizontal swing of the first elastic member, thereby improving the precision and stability of the relative movement between the top plate and the upper die.

[0012] Preferably, the top plate is provided with a positioning rod, the upper die and the lower die are provided with positioning holes, and the positioning rod is slidably connected to the positioning hole. The advantage is that the accuracy of relative movement between the top plate, the upper die and the lower die can be improved through the sliding limit cooperation between the positioning rod and the positioning hole.

[0013] Preferably, a hanging part is provided on the top plate, and a fixing part is provided on the outer wall of the upper mold; when the top plate moves upward and forces the side pull-out block to slide out of the molding cavity, the hanging part contacts the fixing part and drives the upper mold to move upward. The advantage is that when the top plate moves upward and forces the side pull-out block to slide out of the molding cavity, the hanging part starts to contact the fixing part, thereby driving the upper mold to move upward and completing the mold opening. The structure is simple, and during the whole process, only a cylinder that drives the top plate to move up and down is required, and there is no need to set a cylinder that drives the side pull-out block to realize the core pulling operation and the upper mold to complete the mold opening operation, thereby greatly reducing the need for cylinders, thereby reducing the initial investment cost and the later maintenance cost.

[0014] Preferably, the mold opening safety includes a locking rod and a locking block, a receiving hole is provided on the outer side wall of the upper mold, the locking rod is arranged on the lower mold, and a locking groove is provided on the surface of the locking rod close to the receiving hole; the locking block is slidably arranged in the receiving hole, and when the outer end of the locking block slides into the locking groove, the upper mold and the lower mold are restricted from separating. Its advantages are: since it is necessary to perform the core pulling operation before opening the mold to avoid damage to the product and the mold due to direct opening of the upper mold, the mold opening safety can prevent the upper mold from performing the mold opening operation before the side pull-out block completes the core pulling operation (that is, before the side pull-out block completes the core pulling operation, the locking block is slid outward to keep the outer end of the locking block sliding into the locking groove at all times, and the locking rod is able to limit the separation of the upper mold and the lower mold; after the side pull-out block completes the core pulling operation, the locking block is slid inward to separate the outer end of the locking block from the locking groove, and the locking rod loses its lock on the upper mold, thereby allowing the upper mold to be opened to complete the mold opening operation).

[0015] Preferably, a limit block is provided on the outer side wall of the upper mold, and the limit block is used to limit the locking block from being separated from the receiving hole. The advantage is that under the limit of the limit block, the locking block can be prevented from being separated from the receiving hole during the sliding process of the locking block, thereby ensuring the stability of the sliding connection between the locking block and the receiving hole.

[0016] Preferably, a second elastic member is provided at the inner bottom of the receiving hole, and the second elastic member is used to force the locking block to slide outward. The advantage is that: under the action of the second elastic member, each time the locking block slides inward, the locking block can automatically slide outward under the action of the elastic restoring force of the second elastic member, so as to automatically slide into the locking groove to achieve locking, thereby greatly reducing the difficulty of manipulating the locking block; and, in the case where the outer end of the locking block slides into the locking groove, the second elastic member always has an elastic supporting effect on the locking block, so as to prevent the locking block from spontaneously sliding into the receiving hole, thereby improving the locking effect of the locking rod on the upper mold.

[0017] Preferably, the second elastic member is a spring, which has the advantages of simple structure, easy deformation, high elasticity and good stability, thereby increasing its service life.

[0018] Preferably, a pull rod is provided on the top plate, a first inclined surface is provided at the lower end of the pull rod, and a second inclined surface is provided on the locking block; when the top plate moves upward and forces the side withdrawal block to slide out of the molding cavity, the first inclined surface begins to act on the second inclined surface, forcing the locking block to slide into the receiving hole until the locking block is separated from the locking groove. The advantage is that when the top plate moves upward, the side withdrawal block is first forced to slide out of the molding cavity, so that after the core pulling operation is completed, the first inclined surface acts on the second inclined surface, so that the lock is forced to automatically slide into the receiving hole, until the locking block is separated from the locking groove, and the top plate can drive the upper mold to move upward as a whole, thereby automatically completing the mold opening operation.

[0019] Preferably, a limiting surface extends downward from the lower side of the first inclined surface, and when the first inclined surface slides to the top of the locking block, the limiting surface is able to limit the locking block from sliding outward. The advantage is that in the process of forcing the locking to automatically slide into the accommodating hole by the first inclined surface acting on the second inclined surface, once the first inclined surface slides to the top of the locking block, under the action of the elastic restoring force of the second elastic member, the locking block automatically slides outward and limits the first inclined surface from contacting the locking block again, then during mold closing, the locking block will limit the downward movement of the pull rod, thereby failing to complete the mold closing operation. Under the action of the limiting surface, when the first inclined surface slides to the top of the locking block, the limiting surface is able to limit the locking block from sliding outward.

[0020] Preferably, a limit frame is provided on the outer side wall of the upper mold, and the pull rod is slidably connected to the limit frame. The advantage is that the limit frame can improve the accuracy and stability of the pull rod moving up and down, thereby ensuring the accuracy and stability of the interaction between the first inclined surface and the second inclined surface.

[0021] Preferably, the upper end of the locking rod is provided with a chamfer, and the chamfer is arranged facing the second inclined surface. The advantage is that when the mold is closed, the chamfer can interact with the second inclined surface, thereby forcing the locking block to slide into the receiving hole, thereby avoiding the locking block from jamming the locking rod and failing to complete the mold closing operation.

[0022] Preferably, the mold closing safety comprises a slider, the upper end of which is slidably arranged on the lower surface of the top plate; when the slider slides toward the upper mold until the lower end of the slider contacts the upper end of the upper mold, the top plate is restricted from moving downward relative to the upper mold; when the slider slides away from the upper mold until the lower end of the slider separates from the upper end of the upper mold, the top plate is able to move downward relative to the upper mold. Its advantages are: its structure is simple, easy to install, and during operation, it only needs to control the sliding of the slider so that its lower end is in contact with or separated from the upper end of the upper mold, that is, before the mold closing, the slider is first controlled to slide until its lower end contacts the upper end of the upper mold, thereby achieving locking between the top plate and the upper mold, and preventing the side draw block from sliding into the molding cavity before the mold closing operation is completed. Because, once the side draw block slides into the molding cavity before the mold closing operation is completed, the side draw block is prone to collision with the lower mold at the moment of mold closing, thereby damaging the mold.

[0023] Preferably, a third elastic member is provided on the top plate, and the third elastic member is used to force the slide block to slide toward the upper die. The advantage is that after the top plate is moved upward and the core pulling operation is completed, and when the hanging part is in contact with the fixing part, that is, when the distance between the top plate and the upper die is at the maximum, under the action of the third elastic member, the slide block automatically slides toward the upper die, thereby limiting the relative displacement between the upper die and the top plate.

[0024] Preferably, the third elastic member is a spring, which has the advantages of simple structure, easy deformation, high elasticity and good stability, thereby increasing its service life.

[0025] Preferably, a limiting part is provided on the top plate, and the limiting part is used to limit the entire slider from sliding between the upper die and the top plate. The advantage is that the sliding range of the slider can be limited by the limiting part, ensuring that the slider stops sliding after the lower end of the slider slides to contact the upper end of the upper die, thereby avoiding the entire slider sliding between the upper die and the top plate, thereby increasing the difficulty of sliding the slider outward.

[0026] Preferably, the lower mold is provided with an insertion rod, and the upper end of the insertion rod is provided with a third inclined surface; the slider is provided with an insertion hole from top to bottom, the insertion hole is located on the outer side of the upper mold, and the inner side wall of the insertion hole is provided with a fourth inclined surface; when the top plate is moved downward to close the upper mold with the lower mold, the insertion rod is inserted into the insertion hole, and the third inclined surface acts on the fourth inclined surface, forcing the slider to slide away from the upper mold, so that the lower end of the slider is separated from the upper end of the upper mold, and the top plate is able to move downward relative to the upper mold, and force the side draw block to automatically slide into the molding cavity. Its advantage is that when the top plate is moved downward to close the upper mold with the lower mold, the third inclined surface acts on the fourth inclined surface, thereby forcing the slider to automatically slide away from the upper mold, so that the lower end of the slider is separated from the upper end of the upper mold, and then the top plate is able to continue to move downward, thereby forcing the side draw block to automatically slide into the molding cavity.

[0027] Preferably, an oil storage tank is provided on the third inclined surface, which has the advantage that the oil storage tank can be used to store solid or semi-solid lubricating oil, thereby improving the sensitivity of the interaction between the third inclined surface and the fourth inclined surface.

[0028] Compared with the prior art, the beneficial effects of this application are:

[0029] (1) Since the upper end of the draw rod is arranged on the top plate, the lower end of the draw rod is provided with an inclined limit slide rail; and since the side draw block is slidably arranged in the upper mold, and the end of the side draw block away from the molding cavity is slidably arranged in the limit slide rail; when the top plate is moved in the up and down directions, under the action of the inclination angle of the limit slide rail and the sliding limit of the upper mold on the side core pull, the side draw block is forced to slide only in the upper mold, so that the side draw block can slide in and out of the molding cavity, thereby realizing the core pulling operation, and the core pulling operation is simple and convenient;

[0030] (2) By setting the limiting slide rails in different directions and / or at different inclination angles, the core pulling operation can be performed in different directions when the top plate is moved up and down;

[0031] (3) By respectively setting the limit slide rails in different directions and / or different inclination angles on the plurality of the pulling rods, multiple core pulling operations can be performed simultaneously in different directions when the top plate is moved up and down. The operation is simple and easy to control, and there is no need to separately set cylinders to drive the sliding of each of the side pulling blocks, thereby reducing the initial investment cost and the later maintenance cost.

[0032] (4) Since the mold opening safety is arranged between the upper mold and the lower mold, the upper mold and the lower mold are limited to separate before the side withdrawal block slides out of the molding cavity, thereby ensuring that the mold opening operation can be performed after the side withdrawal block completes the core pulling operation, thereby avoiding the molded product being scrapped due to the mold opening being performed before the side withdrawal block is withdrawn;

[0033] (5) Since the mold closing safety is arranged between the top plate and the upper mold, the side drawer block is restricted from sliding into the molding cavity before the upper mold and the lower mold are closed, thereby ensuring that the core feeding operation can be performed after the upper mold and the lower mold are closed. Otherwise, once the side drawer block slides into the molding cavity before the mold closing, the side drawer block is likely to damage the lower mold at the moment when the upper mold and the lower mold are closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional diagram of a yacht engine oil cover in the prior art;

[0035] Figure 2 It is a three-dimensional diagram of a double insurance mold;

[0036] Figure 3 for Figure 2 A partial enlarged view of point I in the middle;

[0037] Figure 4 This is a diagram of the separation state of the top plate and the upper mold;

[0038] Figure 5 It is a three-dimensional diagram of the top plate;

[0039] Figures 6-7 This is the working principle diagram of the side draw block;

[0040] Figure 8 This is the main view of the double insurance mold;

[0041] Figures 9-10 This is the working principle diagram of mold opening insurance;

[0042] Figures 11 to 13 This is the working principle diagram of mold clamping insurance;

[0043] Fig.14 It is a structural diagram of the oil storage tank.

[0044] In the figure: 1, upper mold; 10, positioning hole; 11, positioning slide hole; 12, fixing part; 13, receiving hole; 14, limit block; 15, limit frame; 16, limit part; 17, limit slide groove; 18, vertical slide groove; 19, installation groove; 2, lower mold; 3, side drawer block; 4, top plate; 41, positioning slide rod; 42, hanging part; 43, positioning rod; 5, drawer rod; 51, limit slide rail; 6, molding cavity; 7, first elastic member; 8, mold opening insurance; 81, locking rod ;811, locking groove;812, chamfer;813, accommodating groove;82, locking block;821, second inclined surface;83, second elastic member;84, pull rod;841, first inclined surface;842, limiting surface;9, mold insurance;91, slider;911, plug hole;912, fourth inclined surface;92, third elastic member;93, plug rod;931, third inclined surface;932, oil storage tank;100, oil cover;101, clearance hole;102, screw mounting hole. DETAILED DESCRIPTION

[0045] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0046] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0047] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0048] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0049] Reference Figure 1-14A double insurance mold includes an upper mold 1, a lower mold 2, a side drawer block 3, a top plate 4, a drawer rod 5, a molding cavity 6, a first elastic member 7, a mold opening insurance 8 and a mold closing insurance 9; the top plate 4 is movably arranged above the upper mold 1 in the up-down direction, the upper end of the drawer rod 5 is mounted on the top plate 4 by screws, and the lower end of the drawer rod 5 is provided with an inclined limit slide rail 51. The side drawer block 3 is slidably arranged in the upper mold 1, and a limit slide groove 17 can be set on the side wall of the upper mold 1, and then the side drawer block 3 is slidably installed in the limit slide groove 17, and a molding cavity 6 is surrounded by the side drawer block 3, the upper mold 1 and the lower mold 2; when the upper mold 1 is closed with the lower mold 2, the side drawer block 3 is controlled to slide into the molding cavity 6, so that the molten raw material can be injected through the runner on the lower mold 2, and the oil cover 100 is formed after cooling. The end of the side pull-out block 3 away from the molding cavity 6 is slidably arranged in the limiting slide rail 51. Under the limiting action of the limiting slide groove 17 on the side pull-out block 3 and the oblique pulling action of the limiting slide rail 51 on the side pull-out block 3, when the top plate 4 is moved upward, the side pull-out block 3 can be forced to slide out of the molding cavity 6, so that the core pulling operation (such as Figure 7 When the top plate 4 is moved downward, the side draw block 3 can be forced to slide into the molding cavity 6 to achieve the core feeding operation (such as Figure 6As shown). Under the action of the top plate 4, the draw rod 5 and the limiting slide rail 51, the top plate 4 can be moved up and down to realize the sliding of the side draw block 3 along the side direction of the upper mold 1, thereby greatly simplifying the core pulling operation. In addition, since the limiting slide rails 51 in different directions and / or different inclination angles can be set, the core pulling operation can be realized in different directions when the top plate 4 is moved up and down; and, the angles of the limiting slide rails 51 are different, and the displacement of the top plate 4 moved up and down and the distance forcing the side draw block 3 to slide are also different (for example, in this embodiment, since the thickness of the oil cover 100 is about 4 mm, and a safety distance of about 6 mm is reserved, the top plate 4 can be set to move upward by 30 mm, forcing the side draw block 3 to slide outward by 10 mm). Therefore, by respectively setting limiting slide rails 51 in different directions and / or different inclination angles on multiple draw rods 5, multiple core pulling operations can be performed simultaneously in different directions when the top plate 4 is moved up and down, thereby simplifying the operation and control process, and only a cylinder for driving the top plate 4 to move is required, without separately setting a cylinder for driving each side draw block 3 to slide, thereby reducing the need for cylinders, greatly reducing the initial investment cost and the later maintenance cost. As in the present embodiment, the number of side draw blocks 3 is four, one of which is used to form the clearance hole 101, and the other three are respectively used to form three screw mounting holes 102; the four side draw blocks 3 are respectively slidably connected with the limiting slide grooves 17 set on the four draw rods 5, so when the top plate 4 is moved up and down, the four side draw blocks 3 can be forced to slide in the four limiting slide grooves 17 in the upper mold 1 at the same time. In order to reduce the overall volume of the mold, a vertical slide groove 18 is provided on the upper end surface of the upper mold 1, and the lower end of the vertical slide groove 18 is connected to the limiting slide groove 17, so that the draw rod 5 can be slid up and down and installed in the vertical slide groove 18, thereby greatly reducing the overall volume of the mold and improving the accuracy of the up and down movement of the draw rod 5. In addition, an oil storage tank 932 can be provided on the limiting slide rail 51, and solid or semi-solid lubricating oil can be stored in the oil storage tank 932, so as to improve the smoothness of the sliding matching between the side draw block 3 and the limiting slide rail 51, and avoid the side draw block 3 from getting stuck on the limiting slide rail 51. A wear-resistant sleeve (an oil storage groove 932 for storing solid or semi-solid lubricating oil is provided on the outer wall of the wear-resistant sleeve) or a wear-resistant plate (an oil storage groove 932 for storing solid or semi-solid lubricating oil is provided on the surface of the wear-resistant plate) can be sleeved on the sliding contact surface between the side drawer block 3 and the limiting slide groove 17, so as to improve the smoothness of the sliding of the side drawer block 3 in the limiting slide groove 17 and avoid the side drawer block 3 from getting stuck in the limiting slide groove 17; and the wear-resistant plate or wear-resistant sleeve can prevent the side drawer block 3 from directly contacting the limiting slide groove 17, so as to increase the service life of the side drawer block 3 and the limiting slide groove 17.

[0050] In order to reduce the difficulty of separation between the top plate 4 and the upper mold 1 and prevent the upper mold 1 from moving upward with the top plate 4, the first elastic member 7 is arranged between the top plate 4 and the upper mold 1; after the mold is closed, the top plate 4 is moved downward and the first elastic member 7 is compressed, so that after the side withdrawal block 3 completes the core feeding operation, downward pressure needs to be applied to the top plate 4 to balance the elastic force of the first elastic member 7, thereby ensuring that the top plate 4 is in a stationary state; before opening the mold, when the pressure applied to the top plate 4 is removed or the top plate 4 is moved upward, the first elastic member 7 can exert downward pressure on the upper mold 1, thereby limiting the upper mold 1 from moving upward with the top plate 4, ensuring that the mold opening operation is performed after the core pulling operation is completed; moreover, the elastic force of the first elastic member 7 can force the top plate 4 to separate from the upper mold 1, thereby avoiding the top plate 4 from being difficult to move upward due to the negative pressure generated between the top plate 4 and the upper mold 1 or the large bonding force generated between the side withdrawal block 3 and the product in the molding cavity 6 during the injection molding process. Figure 5 As shown, the first elastic member 7 is preferably four nitrogen springs, which are fixed on the top plate 4 at equal intervals by screws. It has small size, large elastic force, long stroke, stable operation, long service life, gentle elastic force curve, and no need for pre-tightening, etc. It has the functions that conventional elastic components such as metal springs, rubber and air cushions are difficult to complete, which simplifies mold design and manufacturing, facilitates mold installation and adjustment, extends the service life of the mold, and ensures the stability of product quality.

[0051] like Figure 4 , 5As shown, in order to improve the stability of the top plate 4 during the up and down movement and the positioning accuracy between the top plate 4 and the upper die 1, a positioning slide bar 41 is provided on the lower end surface of the top plate 4, and a positioning slide hole 11 is provided on the upper surface of the upper die 1. The positioning slide bar 41 is slidably connected to the positioning slide hole 11. Through the sliding limit cooperation between the positioning slide bar 41 and the positioning slide hole 11, it is possible to avoid reducing the accuracy and stability of the movement of the top plate 4 due to the installation error of the first elastic member 7 or the horizontal swing of the first elastic member 7, thereby improving the accuracy and stability of the relative movement between the top plate 4 and the upper die 1. In order to improve the positioning accuracy and stability of the top plate 4, the upper die 1 and the lower die 2 during the movement, four positioning rods 43 are provided on the top plate 4, and four positioning holes 10 are provided on the upper die 1 and the lower die 2. By sliding the positioning rods 43 in the positioning holes 10, the positioning accuracy and stability of the top plate 4, the upper die 1 and the lower die 2 during the up and down movement of the top plate 4 and the opening of the upper die 1 can be improved. It should be noted that if the positioning slide bar 41 or the positioning rod 43 is cylindrical, the number of them should be at least two, so as to avoid relative rotation between the positioning slide bar 41 and the positioning slide hole 11, or between the positioning rod 43 and the positioning hole 10 during the limited sliding matching process; if the positioning slide bar 41 or the positioning rod 43 is a multi-prism structure, the number of them is not limited, and relative rotation can be avoided during the up and down sliding limiting process. However, in order to improve the stability of the sliding matching between them and avoid the sliding jamming phenomenon due to uneven force, the number of positioning slide bars 41 and positioning rods 43 is preferably four, and they are arranged symmetrically, so as to improve the stability of the top plate 4 and the upper mold 1 during the up and down movement.

[0052] like Figure 3 As shown, in order to avoid the need to separately set up a cylinder to drive the upper mold 1, a hanging portion 42 is provided on the top plate 4. The hanging portion 42 is preferably an L-shaped structure (or a J-shaped structure), and the fixing portion 12 is installed on the outer wall of the upper mold 1 by screws; before the core pulling operation is performed, the lower end of the hanging portion 42 is located below the fixing portion 12; as the top plate 4 is moved upward, the side pull block 3 is forced to slide out of the molding cavity 6 (that is, after the core pulling operation is completed), and the lower end of the hanging portion 42 contacts the fixing portion 12. At this time, when the top plate 4 is moved upward again, the hanging portion 42 is able to hang on the fixing portion 12, thereby driving the upper mold 1 to move upward with the top plate 4, so as to complete the mold opening operation. By setting such a simple structure of the hanging portion 42 and the fixing portion 12, it is only necessary to set up a cylinder to drive the top plate 4 to move up and down, and there is no need to set up a cylinder to drive the upper mold 1, thereby greatly reducing the need for cylinders, and further reducing the initial investment cost and the later maintenance cost. Among them, in order to strengthen the installation strength of the fixing portion 12, such as Fig. 9As shown in Fig. 10, a mounting groove 19 for accommodating one end of the fixing portion 12 can be provided on the outer wall of the upper mold 1, one end of the fixing portion 12 is slidably matched in the mounting groove 19, and the fixing portion 12 is fixedly installed in the mounting groove 19 by screws, so as to greatly improve the installation strength between the fixing portion 12 and the upper mold 1, and avoid the fixing portion 12 from falling off from the upper mold 1. It should be noted that the number of the hanging portions 42 and the fixing portions 12 is not limited, but in order to improve the stability of the upper mold 1 to move by the hanging portions 42 hanging on the fixing portions 12, a plurality of fixing portions 12 can be symmetrically arranged on the upper mold 1, and the same number of hanging portions 42 can be installed at the corresponding positions on the top plate 4, so as to greatly improve the stability of the movement of the upper mold 1.

[0053] like Figure 3 as well as Figure 9-10As shown, the mold opening safety 8 includes a locking rod 81, a locking block 82, a second elastic member 83 and a pull rod 84. A receiving hole 13 is provided on the outer wall of the upper mold 1, and the locking block 82 is slidably set in the receiving hole 13; the locking rod 81 is set on the lower mold 2, and a locking groove 811 is provided on the surface of the locking rod 81 close to the receiving hole 13; when the outer end of the locking block 82 slides into the locking groove 811, the upper mold 1 is limited from separating from the lower mold 2, thereby realizing the locking between the upper mold 1 and the lower mold 2, and preventing the upper mold 1 from moving upward with the top plate 4 during the core pulling operation. If the first elastic member 7 is not provided between the top plate 4 and the upper mold 1, or the elastic force of the first elastic member 7 is insufficient, or the maximum deformation of the first elastic member 7 is short, or the first elastic member 7 fails, when the top plate 4 is moved upward, the upper mold 1 may be driven to move upward along with the top plate 4 before the core pulling operation is completed. At this time, since the side pull-out block 3 is not completely separated from the molding cavity 6, the molded oil cover 100 cannot be completely removed from the molding cavity 6, and it is also very easy to damage the mold or tear the oil cover 100. Therefore, before the core pulling operation is completed, the locking block 82 is slid outward to keep the outer end of the locking block 82 always slid into the locking groove 811, so that the locking rod 81 can limit the separation of the upper mold 1 and the lower mold 2, thereby realizing the locking between the upper mold 1 and the lower mold 2; when the core pulling operation is completed, the locking block 82 is slid inward to separate the outer end of the locking block 82 from the locking groove 811, and the locking rod 81 loses the locking on the upper mold 1, thereby realizing the separation between the upper mold 1 and the lower mold 2, and the upper mold 1 can be opened to complete the mold opening operation. The limit block 14 is installed on the outer wall of the upper mold 1 by screws, and the limit block 14 is used to limit the locking block 82 from being separated from the receiving hole 13; the limit block 14 can be installed in an embedded manner to avoid mutual interference with the locking rod 81 or the locking groove 811; under the limit of the limit block 14, the locking block 82 can be prevented from being separated from the receiving hole 13 during the sliding process of the locking block 82, thereby ensuring the stability of the sliding connection between the locking block 82 and the receiving hole 13. The second elastic member 83 is installed on the inner bottom of the receiving hole 13 to force the locking block 82 to slide outward. Under the action of the second elastic member 83, each time the locking block 82 slides inward, the locking block 82 can automatically slide outward under the action of the elastic restoring force of the second elastic member 83, so as to automatically slide into the locking groove 811 to achieve locking, thereby greatly reducing the difficulty of operating the locking block 82; moreover, when the outer end of the locking block 82 slides into the locking groove 811, the second elastic member 83 always has an elastic support effect on the locking block 82, so as to prevent the locking block 82 from spontaneously sliding into the receiving hole 13, thereby improving the locking effect of the locking rod 81 on the upper mold 1. The upper end of the pull rod 84 is fixed to the top plate 4 by screws, and the lower end of the pull rod 84 is provided with a first inclined surface 841, and the lower side of the first inclined surface 841 extends downward to a limited position surface 842, and the locking block 82 is provided with a second inclined surface 821.When the top plate 4 is moved upward, it forces the side draw block 3 to slide outward and simultaneously drives the pull rod 84 to move upward. After the side draw block 3 completes the core pulling operation, the first inclined surface 841 begins to act on the second inclined surface 821, automatically forcing the locking block 82 to slide into the receiving hole 13 until the locking block 82 is separated from the locking groove 811. At this time, the locking rod 81 loses the locking of the upper mold 1, and then by making the hanging part 42 contact with the fixing part 12, the top plate 4 drives the upper mold 1 to move upward together, thereby completing the mold opening operation. When the first inclined surface 841 slides to the top of the locking block 82, the limiting surface 842 is able to limit the locking block 82 from sliding outward. Without the limiting surface 842, once the first inclined surface 841 slides to the top of the locking block 82, the locking block 82 automatically slides outward under the elastic restoring force of the second elastic member 83, and limits the first inclined surface 841 from contacting the locking block 82 again. When the mold is closed, the locking block 82 will limit the pull rod 84 from moving downward, and the mold closing operation cannot be completed. The upper end of the locking rod 81 is provided with a chamfer 812, and the chamfer 812 is arranged facing the second inclined surface 821; when the mold is closed, the chamfer 812 can interact with the second inclined surface 821, thereby forcing the locking block 82 to slide into the receiving hole 13, thereby avoiding the inability to complete the mold closing operation due to the locking block 82 getting stuck in the locking rod 81. In addition, in order to improve the accuracy and stability of the up and down movement of the pull rod 84, a limit frame 15 is provided on the outer side wall of the upper mold 1, and the pull rod 84 is slidably connected to the limit frame 15. The limit frame 15 can improve the accuracy and stability of the up and down movement of the pull rod 84, thereby ensuring the accuracy and stability of the interaction between the first inclined surface 841 and the second inclined surface 821. It should be noted that in order to reduce the overall volume of the mold opening insurance 8, the upper end of the locking rod 81 is downwardly provided with a receiving groove 813, and the receiving groove 813 can be used to receive the pull rod 84 (such as. Figure 3 or Fig. 9 or Fig.10 As shown), the overall volume of the mold opening insurance 8 can be greatly reduced. In addition, the stability of the locking of the mold opening insurance 8 can be improved by symmetrically arranging multiple mold opening insurances 8, thereby improving the locking effect of the upper mold 1.

[0054] like Figure 11-14As shown, the mold closing insurance 9 includes a slider 91, a third elastic member 92 and an insert rod 93; the upper end of the slider 91 is slidably arranged on the lower surface of the top plate 4, and when the slider 91 slides toward the upper mold 1 until the lower end of the slider 91 contacts the upper end of the upper mold 1, the relative displacement between the top plate 4 and the upper mold 1 is limited, so as to avoid the top plate 4 moving downward relative to the upper mold 1 and forcing the side draw block 3 to complete the core feeding operation before the mold closing operation between the upper mold 1 and the lower mold 2 is completed. Otherwise, once the side draw block 3 slides into the molding cavity 6 before the mold closing operation is completed, the side draw block 3 and the lower mold 2 are prone to collision at the moment of mold closing, thereby damaging the mold. After waiting for the upper mold 1 and the lower mold 2 to complete the mold closing operation, when the slider 91 slides away from the upper mold 1 until the lower end of the slider 91 is separated from the upper end of the upper mold 1, the top plate 4 can move downward relative to the upper mold 1, thereby realizing the core feeding operation of the side draw block 3. The third elastic member 92 is arranged on the top plate 4 and is used to force the slider 91 to slide toward the upper mold 1; after the top plate 4 is moved upward and the core pulling operation is completed, and when the hanging portion 42 contacts the fixing portion 12, at this time, the distance between the top plate 4 and the upper mold 1 is the largest, and under the action of the third elastic member 92, the slider 91 automatically slides toward the upper mold 1, thereby limiting the relative displacement between the upper mold 1 and the top plate 4. A limiting portion 16 is arranged on the top plate 4, and the limiting portion 16 is a groove-shaped structure. The sliding amplitude of the slider 91 is limited by the limiting portion 16, ensuring that the slider 91 stops sliding after the lower end slides to contact the upper end of the upper mold 1, thereby avoiding the entire part of the slider 91 sliding between the upper mold 1 and the top plate 4, thereby increasing the difficulty of sliding the slider 91 outward. The lower end of the insert rod 93 is fixed to the lower mold 2 by screws, and the upper end of the insert rod 93 is provided with a third inclined surface 931; the slider 91 is provided with an insertion hole 911 from top to bottom, the insertion hole is located on the outer side of the upper mold 1, and the inner wall of the insertion hole 911 is provided with a fourth inclined surface 912. When the top plate 4 is moved downward to close the upper mold 1 and the lower mold 2, the insert rod 93 is inserted into the insertion hole 911, and the third inclined surface 931 acts on the fourth inclined surface 912, forcing the slider 91 to slide away from the upper mold 1, so that the lower end of the slider 91 is separated from the upper end of the upper mold 1, and the top plate 4 can continue to move downward relative to the upper mold 1, and force the side draw block 3 to automatically slide into the molding cavity 6. In order to improve the smoothness and sensitivity of the interaction between the third inclined surface 931 and the fourth inclined surface 912, an oil storage tank 932 is provided on the third inclined surface 931. Solid or semi-solid lubricating oil can be stored in the oil storage tank 932, thereby greatly improving the smoothness and sensitivity of the interaction between the third inclined surface 931 and the fourth inclined surface 912. It should be noted that by symmetrically arranging multiple mold safety devices 9, it is possible to ensure that the locking effect between the top plate 4 and the upper mold 1 is strengthened before the mold closing operation is completed, thereby ensuring that the core feeding operation is performed after the mold closing operation is completed.

[0055] The second elastic member 83 and the third elastic member 92 are preferably springs, which are easily deformed, highly elastic, and have good stability, thereby increasing the service life of the first elastic member 7 and the second elastic member 83 .

[0056] Working principle: After the molten raw material in the molding cavity 6 cools down to form the oil cover 100, the top plate 4 is driven by the cylinder to move upward, and the first elastic member 7 arranged between the top plate 4 and the upper mold 1 can promote the separation of the top plate 4 and the upper mold 1, so as to prevent the upper mold 1 from moving upward with the top plate 4; coupled with the locking of the mold safety 9 (i.e. the locking effect between the locking groove 811 and the locking block 82, such as Fig. 9 As shown in the figure, the upper mold 1 and the lower mold 2 are prevented from separating. During the upward movement of the top plate 4, the inclined limit slide rail 51 can force the side pull-out block 3 to slide outward, thereby completing the core pulling operation (as shown in the figure). Figure 6-7 As shown). Since the top plate 4 can move upward while driving the pull rod 84, after the side pull block 3 completes the core pulling operation, the first inclined surface 841 at the lower end of the pull rod 84 starts to act on the second inclined surface 821, forcing the locking block 82 to slide into the receiving hole 13, thereby separating from the locking groove 811; at this time, by making the lower end of the hanging portion 42 contact with the fixing portion 12, the top plate 4 is continued to move upward, so that the upper mold 1 can be driven to move upward along with the top plate 4, thereby completing the mold opening operation (as shown). Fig.10 As shown in the figure, after the mold opening operation is completed, the limit surface 842 can limit the locking block 82 from popping outward, thereby preventing the locking block 82 from limiting the downward movement of the pull rod 84 and affecting the mold closing operation. During the mold opening operation, the upper end of the insertion rod 93 falls off the insertion hole 911, and under the elastic force of the third elastic member 92, the slider 91 automatically slides toward the upper mold 1 until the limit portion 16 limits the slider 91 and stops sliding. At this time, one end of the slider 91 just slides into between the upper mold 1 and the top plate 4, and the slider 91 is able to limit the downward displacement of the top plate 4 relative to the upper mold 1 (as shown in the figure). Fig.11 As shown). When the mold is closed, when the top plate 4 is driven to move downward, the top plate 4 drives the upper mold 1 to move downward, and there will be no relative displacement between the top plate 4 and the upper mold 1 (that is, the side drawer block 3 will not move in the limiting slide groove 17), until the upper mold 1 and the lower mold 2 are completely closed, the upper end of the insertion rod 93 is inserted into the insertion hole 911, and the third inclined surface 931 acts on the fourth inclined surface 912, so as to force the slider 91 to automatically slide toward the outside of the outer upper mold 1, thereby losing the locking between the top plate 4 and the upper mold 1 (as shown). Fig.12As shown in the figure, the top plate 4 can continue to move downward relative to the upper mold 1 until the top plate 4 contacts the lower mold 2, and the side pull-out block 3 just completes the core feeding operation, and the first inclined surface 841 moves downward with the top plate 4 to the bottom of the locking block 82, and the locking block 82 can automatically slide outward into the locking groove 811 under the elastic action of the second elastic member 83 to re-lock the upper mold 1. In the above-mentioned whole process, it is only necessary to control the up and down movement of the top plate 4 to realize the core pulling operation, core feeding operation, mold opening operation and mold closing operation, and it is possible to realize the control of the mold opening safety 8 and the control of the mold closing safety 9, so as to ensure that the core pulling operation is completed between the mold opening operation and the core feeding operation is completed after the mold closing operation.

[0057] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A double insurance mold, comprising an upper mold, a lower mold and a plurality of side drawer blocks, characterized in that: It also includes a mold opening safety, a mold closing safety, a top plate and a plurality of draw rods, the upper end of the draw rod is arranged on the top plate, and the lower end of the draw rod is provided with an inclined limiting slide rail; the side draw block is slidably arranged in the upper mold, a molding cavity is surrounded by the side draw block, the upper mold and the lower mold, and one end of the side draw block away from the molding cavity is slidably arranged in the limiting slide rail; the top plate is movably arranged above the upper mold in the up and down directions, and the top plate can be moved up and down to force the side draw block to slide in and out of the molding cavity; the mold opening safety is arranged between the upper mold and the lower mold, and before the side draw block slides out of the molding cavity, the upper mold and the lower mold are limited to separate; the mold closing safety is arranged between the top plate and the upper mold, and before the upper mold and the lower mold are closed, the side draw block can be limited to slide into the molding cavity; A first elastic member is provided between the top plate and the upper mold, and the first elastic member is used to force the top plate to separate from the upper mold; A positioning slide rod and a positioning rod are provided on the lower end surface of the top plate; a positioning slide hole is provided on the upper surface of the upper mold, and the positioning slide rod is slidably connected up and down in the positioning slide hole; positioning holes are provided on both the upper mold and the lower mold, and the positioning rod is slidably connected up and down in the positioning holes.

2. The double insurance mold according to claim 1, characterized in that: A hanging part is provided on the top plate, and a fixing part is provided on the outer wall of the upper mold; when the top plate moves upward and forces the side drawer block to slide out of the molding cavity, the hanging part contacts the fixing part and drives the upper mold to move upward.

3. The double insurance mold according to claim 1, characterized in that: The mold opening safety includes a locking rod and a locking block. A receiving hole is provided on the outer side wall of the upper mold. The locking rod is arranged on the lower mold, and a locking groove is provided on the surface of the locking rod close to the receiving hole. The locking block is slidably arranged in the receiving hole, and when the outer end of the locking block slides into the locking groove, the upper mold and the lower mold are restricted from separating.

4. The double insurance mold according to claim 3, characterized in that: A limit block is provided on the outer side wall of the upper mold, and the limit block is used to limit the locking block from being separated from the accommodating hole; a second elastic member is provided on the inner bottom of the accommodating hole, and the second elastic member is used to force the locking block to slide outward.

5. The double insurance mold according to claim 4, characterized in that: A pull rod is provided on the top plate, a first inclined surface is provided at the lower end of the pull rod, and a second inclined surface is provided on the locking block; when the top plate moves upward and forces the side drawer block to slide out of the forming cavity, the first inclined surface begins to act on the second inclined surface, forcing the locking block to slide into the accommodating hole until the locking block is separated from the locking groove; a limiting surface is extended downward from the lower side of the first inclined surface, and when the first inclined surface slides to the top of the locking block, the limiting surface is able to limit the locking block from sliding outward.

6. The double insurance mold according to claim 1, characterized in that: The mold closing safety includes a slider, the upper end of which is slidably arranged on the lower surface of the top plate; when the slider slides toward the upper mold until the lower end of the slider contacts the upper end of the upper mold, the top plate is restricted from moving downward relative to the upper mold; when the slider slides away from the upper mold until the lower end of the slider is separated from the upper end of the upper mold, the top plate is able to move downward relative to the upper mold.

7. The double insurance mold according to claim 6, characterized in that: A third elastic member is provided on the top plate, and the third elastic member is used to force the slider to slide toward the upper mold; a limiting portion is provided on the top plate, and the limiting portion is used to limit the entire slider from sliding between the upper mold and the top plate.

8. The double insurance mold according to claim 7, characterized in that: The lower mold is provided with an insertion rod, and the upper end of the insertion rod is provided with a third inclined surface; the slider is provided with an insertion hole from top to bottom, the insertion hole is located on the outer side of the upper mold, and the inner side wall of the insertion hole is provided with a fourth inclined surface; when the top plate is moved downward to make the upper mold and the lower mold closed, the insertion rod is inserted into the insertion hole, and the third inclined surface acts on the fourth inclined surface, forcing the slider to slide away from the upper mold and separate the lower end of the slider from the upper end of the upper mold, so that the top plate can move downward relative to the upper mold and force the side draw block to automatically slide into the molding cavity.

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