A precision alignment injection mold for washing machine shell

Abstract

The application discloses a kind of precision alignment injection mould of washing machine shell, it is related to household appliance production equipment technical field, including injection molding machine and the mould set being formed by front mould and back mould, the both sides of the mould set are all provided with inserting hole, each inserting hole is adapted to be inserted into inserting rod, the protruding end of the inserting rod is installed with the vertical state of distance probe rod, the plane portion is provided on the injection molding machine, when the bottom end of the distance probe rod is contacted with the plane portion, then the injection hole of the mould set and the injection molding machine nozzle on the injection molding machine are on the same horizontal plane, the distance probe rod is installed on the side of mould assembly in the application, whether the injection hole of mould set and the injection molding machine nozzle on the injection molding machine are on the same horizontal plane is determined by the contact condition of distance probe rod and machine table plane, it is beneficial to the precision butt joint of the injection hole of subsequent mould set and the injection molding machine nozzle on the injection molding machine.

Description

Technical Field

[0001] This invention relates to the field of home appliance manufacturing equipment technology, specifically to an injection mold for precisely aligning the outer shell of a washing machine. Background Technology

[0002] Injection molds are used to inject molten plastic into a precision-machined cavity under high temperature and pressure. After cooling, the desired product is formed. In the home appliance industry, the plastic casing of washing machines is made by injection molds. The weight and specifications of existing injection molds are usually positively correlated with the product volume.

[0003] Existing injection molds consist of a front mold and a rear mold arranged horizontally. When installing the injection mold on the injection molding machine, the injection hole of the mold needs to be precisely aligned with the injection nozzle on the injection molding machine, otherwise leakage will occur.

[0004] The current method involves setting a positioning ring protruding from the outer end of the rear mold of the injection mold. The positioning ring is matched with a groove on the front face of the injection molding machine to determine the position of the mold on the injection molding machine. However, the existing solution has shortcomings. Because the injection mold is bulky, it is usually moved to the mold installation position on the injection molding machine using an overhead crane. During the process of docking the injection hole of the mold with the injection nozzle on the injection molding machine, the mold and the machine are squeezed and slid against each other. The mold and the injection molding machine are prone to multiple violent collisions. On the one hand, this can easily damage the machine, and on the other hand, it can cause deformation of the mold fit, which is not conducive to subsequent normal production. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold for precisely aligning the outer casing of a washing machine, thereby overcoming the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An injection mold for precisely aligning a washing machine casing includes an injection molding machine and a mold assembly consisting of a front mold and a rear mold. The mold assembly has insertion holes on both sides, and insertion rods are fitted into each insertion hole. A vertically positioned probe rod is installed on the extended end of each insertion rod. The injection molding machine has a flat surface. When the bottom end of the probe rod contacts the flat surface, the injection hole of the mold assembly and the injection nozzle of the injection molding machine are on the same horizontal plane.

[0008] Preferably, each side of the mold assembly has two insertion holes, and the two insertion holes on each side of the mold assembly are located on the side of the front mold and the side of the rear mold, respectively.

[0009] Preferably, two parallel limiting plates are installed on the flat part. When the opposing surfaces of the two limiting plates simultaneously contact the side of the probe rod, the injection hole of the mold assembly and the injection nozzle on the injection molding machine are on the same vertical plane.

[0010] Preferably, the mold assembly is provided with a pull rod on its side, and the two ends of the pull rod are fixed to their respective plug rods. The pull rod and the plug rod can lock the mold assembly in the mold closing state.

[0011] Preferably, the top of the mold assembly has a hanging opening that corresponds to and communicates with the insertion hole, and the rod of the insertion rod located at the hanging opening can be hooked by the overhead crane hook.

[0012] Preferably, the plug rod is a hollow tube column structure, with a core rod inside. The bottom of the plug rod located in the hanging port has an opening, allowing the overhead crane hook to contact the core rod through the opening. An elastic buffer unit is provided between the core rod and the hollow inner top wall of the plug rod, which can buffer the core rod as it approaches the hollow inner top wall of the plug rod.

[0013] Preferably, the extended end of the plug rod has a notch that communicates with the outside, and one end of the probe rod is pivotally connected to the hollow tube of the plug rod through the notch.

[0014] Preferably, a locking unit is provided between the insertion end of the probe rod and the hollow inner top wall of the plug rod, and the locking unit can lock the probe rod in a vertical state.

[0015] Preferably, the locking unit includes an elastic buffer unit, on which a first elastic check unit is installed, and a protruding plate is fixed at the insertion end of the probe rod. When the probe rod is in a vertical state, the first elastic check unit engages and locks with the protruding plate.

[0016] Preferably, the elastic buffer unit includes a mounting groove formed on the hollow inner top wall of the plug rod, a lever plate is provided in the mounting groove, the middle part of the lever plate is hinged to the mounting groove, one end of the lever plate is installed with a first elastic check unit, and the other end of the lever plate is connected to the bottom of the mounting groove by a spring. When the core rod contacts the hollow inner top wall of the plug rod, the spring is compressed and deformed, and the first elastic check unit is engaged and locked with the protruding plate.

[0017] In the above technical solution, the present invention provides an injection mold for precisely aligning a washing machine shell. By installing a probe rod on the side of the mold assembly, the contact status between the probe rod and the machine base plane is used to determine whether the injection hole of the mold assembly and the injection nozzle on the injection molding machine are on the same horizontal plane. This facilitates the precise alignment of the injection hole of the mold assembly with the injection nozzle on the injection molding machine, and also reduces the possibility of collision between the mold assembly and the machine base. This protects both the machine base and the mold, and also improves the safety and efficiency of mold assembly installation, making the installation process quick, convenient and accurate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the installation of an injection mold for precisely aligning a washing machine shell according to the present invention on an injection molding machine;

[0020] Figure 2 This is a schematic cross-sectional view of the insertion interface of an injection mold for precisely aligning the outer shell of a washing machine according to the present invention.

[0021] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the locking structure of an injection mold for precisely aligning the outer shell of a washing machine according to the present invention;

[0023] Figure 5 This is a schematic diagram of an injection mold for precisely aligning a washing machine casing, as per the present invention, in a suspended state.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Injection molding machine; 2. Mold assembly; 3. Insertion hole; 4. Insertion rod; 5. Probe rod; 6. Flat part; 7. Limiting plate; 8. Pull rod; 9. Hanging port; 10. Core rod; 11. Opening; 12. Elastic buffer unit; 12.1. Mounting groove; 12.2. Baffle plate; 12.3. Spring; 13. Notch; 14. Locking unit; 15. Protruding plate; 16. First elastic check valve unit; 17. Second elastic check valve unit; 18. Horizontal bubble column; 19. Recessed groove; 20. Check valve plate; 21. Return spring. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The washing machine casing is injection molded on an injection molding machine using an injection mold. The injection mold consists of a horizontally arranged front mold and a rear mold, which can be in two states: closed and open. During installation on the injection molding machine, the front and rear molds are in the closed state. Then, an overhead crane lifts the injection mold to its mounting position on the injection molding machine. Because the overhead crane is connected to the injection mold via a chain hook, the injection mold inevitably sways during its movement. Due to the limited space at the mounting position on the injection molding machine, collisions between the injection mold and the machine are very likely to occur during actual operation, especially between the injection hole of the existing injection mold and the injection nozzle on the injection molding machine. The current method for alignment involves setting a positioning ring protruding from the outer end of the rear mold of the injection mold. The positioning ring is matched with a groove on the front face of the injection molding machine to determine the position of the mold on the machine. Therefore, in actual operation, the mold needs to be slid directly against the side wall of the mounting part of the machine until the positioning ring is matched with the groove on the front face of the injection molding machine. During this process, the mold and the machine are squeezed and slid against each other, and multiple violent collisions can easily occur between the mold and the injection molding machine. This can easily damage the machine and cause deformation of the mold, which is not conducive to subsequent normal production. To solve the above problems, we propose an injection mold for precise alignment of the washing machine shell.

[0028] Please see Figure 1 - Figure 5 The present invention provides an injection mold for precisely aligning a washing machine shell, including an injection molding machine 1 and a mold assembly 2 consisting of a front mold and a rear mold. The mold assembly 2 has insertion holes 3 on both sides, and an insertion rod 4 is adapted to be inserted into each insertion hole 3. A vertical probe rod 5 is installed on the extended end of the insertion rod 4. The injection molding machine 1 is provided with a flat part 6. When the bottom end of the probe rod 5 contacts the flat part 6, the injection hole of the mold assembly 2 and the injection nozzle on the injection molding machine 1 are on the same horizontal plane.

[0029] Specifically, the axis of the insertion hole 3 is parallel to the top horizontal plane of the mold, the insertion hole 3 does not interfere with the internal water channel structure of the mold, the rod of the insertion rod 4 is fitted into the insertion hole 3, part of the rod of the insertion rod 4 protrudes outside the mold assembly 2, the axis of the vertical probe rod 5 is perpendicular to the horizontal plane, the axis of the vertical probe rod 5 is perpendicular to the axis of the insertion rod 4, the bottom of the vertical probe rod 5 is lower than the bottom plane of the mold assembly 2, the flat part 6 is located below the mold mounting position of the injection molding machine 1, and the top surface of the flat part 6 is parallel to the horizontal plane;

[0030] In actual use, first insert the plug rod 4 into the corresponding plug hole 3, then adjust the probe rod 5 to a vertical position, and then use the overhead crane to lift the mold assembly 2 to a position above the mold loading position of the injection molding machine 1. After the mold assembly 2 stabilizes and stops swinging, slowly lower the mold assembly 2. When the vertical probe rod 5 contacts the flat part 6, immediately stop the descent of the mold assembly 2. The injection hole of the mold assembly 2 and the injection nozzle on the injection molding machine 1 are on the same horizontal plane.

[0031] It should be noted that the injection molding machine 1 drives the front and rear molds of the mold assembly 2 to close and separate the molds by installing a mold clamping mechanism on the injection molding machine 1. The mold clamping mechanism mainly includes a fixed plate fixed to the injection molding machine 1 and a moving plate that can move horizontally linearly relative to the fixed plate. The surfaces of the fixed plate and the moving plate are perpendicular to the horizontal plane. The front and rear molds of the mold assembly 2 are respectively installed on the fixed plate and the moving plate. When installing the mold assembly 2, the distance between the fixed plate and the moving plate of the mold clamping mechanism is at its maximum, thus reserving sufficient installation space for the installation of the mold assembly 2. The mold clamping mechanism of the injection molding machine 1 is existing technology and will not be described in detail.

[0032] When the injection hole of mold assembly 2 is on the same horizontal plane as the injection nozzle on injection molding machine 1, the injection molding machine is switched to the mold closing mode. At this time, the front and rear ends of mold assembly 2 are clamped by the clamping force of the mold locking mechanism of injection molding machine 1, and the two ends of mold assembly 2 are clamped by the fixed plate and the moving plate. At this time, the injection hole of mold assembly 2 and the injection nozzle on injection molding machine are also connected. Then, the front mold and the rear mold are fixed on their respective fixed plates and moving plates by the corresponding clamping and locking parts. At this time, the overhead crane is lowered, and mold assembly 2 no longer makes the corresponding lowering movement. Then, the hook of the overhead crane and the plug rod 4 are separated from mold assembly 2.

[0033] Throughout the process, the contact between the probe rod and the machine platform is used to determine whether the injection hole of the mold group and the injection nozzle on the injection molding machine are on the same horizontal plane. This is beneficial for the precise alignment of the injection hole of the mold group with the injection nozzle on the injection molding machine, and also reduces the possibility of collision between the mold group and the machine platform. This protects both the machine platform and the mold, and also improves the safety and efficiency of the installation of mold group 2.

[0034] In another embodiment of the present invention, each side of the mold assembly 2 has two insertion holes 3. The two insertion holes 3 on each side of the mold assembly 2 are located on the side of the front mold and the side of the rear mold, respectively. The side of the mold assembly 2 is provided with a pull rod 8. The two ends of the pull rod 8 are fixed to their respective corresponding insertion rods 4. The pull rod 8 and the insertion rod 4 can lock the mold assembly 2 in the mold closing state.

[0035] In other words, during actual use, the mold assembly 2 in the closed state may separate from the front mold and fail to fit completely due to the concentrated extrusion pressure between the front mold and the rear mold during hoisting and transportation. Alternatively, the mold assembly 2 may experience uneven extrusion pressure between the front mold and the rear mold during hoisting. In this case, the pull rod 8, the plug rod 4, and the plug holes 3 located on the sides of the front mold and the rear mold together form a locking structure for the mold assembly 3 in the hoisting state. This keeps the mold assembly 2 in the closed state under stable stress during hoisting and prevents the mold assembly 3 from becoming loose and unevenly stressed due to the hoisting force.

[0036] In another embodiment of the present invention, a horizontal bubble column 18 is embedded and fixed on the pull rod 8. The rod body of the pull rod 8 is parallel to the top surface of the mold assembly 2. The horizontal bubble column 18 facilitates the determination of the horizontal state of the pull rod 8. Preferably, both ends of the pull rod 8 are threaded. The two ends of the pull rod 8 are threadedly inserted into the side of the corresponding plug rod 4. In actual use, the locking force of the pull rod 8 and the plug rod 4 to lock the mold assembly 2 in the mold closing state can be controlled by twisting the pull rod 8.

[0037] In another embodiment of the present invention, two parallel limiting plates 7 are installed on the planar part 6. The planar part 6 can be a frame structure, with the frame opening forming the planar part 6. There is a gap between the two limiting plates 7. The gap between the two limiting plates 7 is greater than the width of the mold assembly 2. The limiting plates 7 form a stepped structure on the planar part 6. When the opposing plates of the two limiting plates 7 simultaneously contact the side of the probe rod 5, the injection hole of the mold assembly 2 and the injection nozzle on the injection molding machine 1 are on the same vertical plane.

[0038] In actual use, when the vertical probe rod 5 approaches the flat part 6, the descent of the mold assembly 2 is immediately stopped by the overhead crane. Since the mold assembly 2 is still in the hoisting state, the mold assembly 2 is rotated so that the end injection hole of the mold assembly 2 is aligned with the injection nozzle on the injection molding machine. At this time, the probe rods 5 on both sides of the mold assembly 2 also contact the side of the corresponding limit plate 7. Thus, it can be concluded that the end injection hole of the mold assembly 2 is aligned with the injection nozzle on the injection molding machine, which facilitates the precise docking of the end injection hole of the mold assembly 2 with the injection nozzle on the injection molding machine.

[0039] In summary, by measuring the relative distance between the probe rod 5 and the flat part 6, it is determined whether the end injection hole of the mold assembly 2 and the injection nozzle on the injection molding machine are on the same horizontal plane. Then, by measuring whether the two probe rods 5 are in contact with the side of the corresponding limiting plate 7, it is determined whether the end injection hole of the mold assembly 2 and the injection nozzle on the injection molding machine are on the same vertical plane. Once both are determined, the end injection hole and the injection nozzle on the injection molding machine can be aligned by using the clamping mechanism of the injection molding machine. This improves the installation accuracy and speed of the mold assembly 2 on the injection molding machine 1, and the structure is simple and easy to implement.

[0040] In another embodiment of the present invention, the probe rod 5 includes a rigid rod connected to the plug rod 4, and a flexible rod is coaxially fixed to the other end of the rigid rod. So when the lower half of the probe rod 5 is squeezed against the side of the limiting plate 7, the flexible rod can bend elastically, which can play a certain role in preventing breakage due to collision. The flexible rod is made of elastic rod material such as wood, elastic plastic or fiberglass.

[0041] In another embodiment of the present invention, the top of the mold assembly 2 is provided with a hanging opening 9 corresponding to and communicating with the insertion hole 3. The hanging opening 9 is a deep groove structure. The axis of the insertion hole 3 passes through the side wall of the hanging opening 9. The rod body of the insertion rod 4 located in the hanging opening 9 can be hooked by the crane hook. Furthermore, the insertion rod 4 is a hollow tube structure. The insertion rod 4 is actually a rigid tube. The inside of the insertion rod 4 is provided with a core rod 10. The core rod 10 is made of hard metal and enhances the rigidity of the insertion rod 4. The bottom of the rod body of the insertion rod 4 located in the hanging opening 9 is provided with an opening 11. The crane hook can contact the core rod 10 through the opening 11. The core rod 10 can move radially within the hollow tube structure of the insertion rod 4. An elastic buffer unit 12 is provided between the core rod 10 and the hollow inner top wall of the insertion rod 4. The elastic buffer unit 12 can play a buffering role when the core rod 10 approaches the hollow inner top wall of the insertion rod 4.

[0042] In actual use, after the plug rod 4 is plugged into the plug hole 3, the plug rod 4 can be seen through the hook 9. The crane hook is then inserted into the hook 9, so that the hook and the plug rod 4 are hooked together. The crane hook contacts the core rod 10 through the opening 11. When the crane hook rises, the core rod 10 is pulled vertically upward within the internal space of the plug rod 4 by the hook force of the crane hook. At this time, the elastic buffer unit 12 undergoes elastic deformation under force. During the deformation of the elastic buffer unit 12, the plug rod 4 also completes the fitting movement with the hole wall of the plug hole 3, thereby avoiding the situation where the crane hook rises too fast and the impact force of the plug rod 4 on the hole wall of the plug hole 3 is too large.

[0043] In other words, the hook of the special overhead crane is connected to the overhead crane by a chain. Therefore, the whiplash effect generated when the overhead crane is raised will also aggravate the impact between the plug rod 4 and the plug hole 3. By setting the elastic buffer unit 12, the intensity of the collision between the plug rod 4 and the plug hole 3 can be effectively reduced. When the core rod 10 can fully contact the top wall inside the hollow tube of the plug rod 4, the elastic buffer unit 12 is in the maximum deformation state. Then, as the hook of the overhead crane continues to rise, the mold group 2 moves with the hook of the overhead crane.

[0044] In another embodiment of the present invention, the protruding end of the plug rod 4 is provided with a notch 13 communicating with the outside. One end of the probe rod 5 is axially connected in the hollow tube of the plug rod 4 through the notch 13. It should be noted that the fan-shaped surface formed by the deflection trajectory of the probe rod 5 is perpendicular to the side of the mold group 2. When the probe rod 5 is in the vertical state, it is parallel to the side of the mold group 2. When the probe rod 5 is in the horizontal state, it is perpendicular to the side of the mold group 2. The axis of the probe rod 5 is on the same straight line as the axis of the plug rod 4.

[0045] Since the bottom of the probe rod 5 is lower than the bottom of the mold assembly 2, and the mold assembly 2 is usually placed on a pallet or the ground, it is inconvenient to install the probe rod 5 on the mold assembly 2. Therefore, in actual use, the probe rod 5 is axially connected to the plug rod 4. When the mold assembly 2 has not been lifted, the axis of the probe rod 5 and the axis of the plug rod 4 are in the same straight line. At this time, the probe rod 5 is in a horizontal state and perpendicular to the side of the mold assembly 2. After the mold assembly 2 is lifted, the probe rod 5 is switched to a vertical state to ensure that the probe rod 5 can be used normally on the mold assembly 2.

[0046] In another embodiment of the present invention, a locking unit 14 is provided between the insertion end of the probe rod 5 and the hollow inner top wall of the plug rod 4. The locking unit 14 can lock the probe rod 5 in a vertical state, thereby preventing it from swinging in the mold group 2 in a vertical state.

[0047] Furthermore, the locking unit 14 includes an elastic buffer unit 12, on which a first elastic check unit 16 is installed. A protruding plate 15 is fixed to the extension end of the probe rod 5. The length direction line of the protruding plate 15 is parallel to the axis of the probe rod 5. When the probe rod 5 is in a vertical state, the first elastic check unit 16 engages and locks with the protruding plate 15. A second elastic check unit 17 is movably installed at the end of the core rod 10. The check direction of the first elastic check unit 16 is opposite to that of the second elastic check unit 17.

[0048] It should be further noted that both the first elastic check unit 16 and the second elastic check unit 17 include a recessed groove 19 hinged to the mounting, and a check plate 20 hinged in the recessed groove 19. A return spring 21 is provided between the check plate 20 and the recessed groove 19. The first elastic check unit 16 and the second elastic check unit 17 are of the same structure.

[0049] Specifically, the elastic buffer unit 12 includes an installation groove 12.1 formed on the hollow inner top wall of the plug rod 4. The installation groove 12.1 is a long groove, and the length direction of the installation groove 12.1 is parallel to the axis of the plug rod 4. A lever plate 12.2 is provided in the installation groove 12.1. The length direction of the lever plate 12.2 is parallel to the length direction of the installation groove 12.1. The middle part of the lever plate 12.2 is hinged to the installation groove 12.1. The lever plate 12.2 can perform lever movement in the installation groove 12.1. One end of the lever plate 12.2 is installed with the first elastic check unit 16, and the other end of the lever plate 12.2 is connected to the bottom of the installation groove 12.1 by a spring 12.3. When the core rod 10 contacts the hollow inner top wall of the plug rod 4, the spring 12.3 is compressed and deformed, and the first elastic check unit 16 is engaged and locked with the protruding plate 15.

[0050] In actual use, when the mold assembly 2 has not yet been lifted, the probe rod 5 is in a horizontal state, and the elastic buffer unit 12 is also in a natural state. The second elastic check unit 17 at the end of the core rod 10 is on the deflection trajectory line of the protrusion plate 15. The second elastic check unit 17 keeps the probe rod 5 in a horizontal state by unidirectionally limiting the protrusion plate 15.

[0051] When the mold assembly 2 is lifted, the core rod 10 moves vertically upward within the internal space of the plug rod 4. At this time, the elastic buffer unit 12 is also in a deformed state. The second elastic check unit 17 at the end of the core rod 10 disengages from the deflection trajectory line of the protrusion plate 15. At this time, the second elastic check unit 17 no longer limits the protrusion plate 15, so the probe rod 5 switches from a horizontal state to a vertical state around the hinge position under the action of gravity.

[0052] During the process of switching the probe rod 5 to the vertical state, the protruding plate 15 needs to be deflected clockwise. The protruding plate 15 passes the first elastic check unit 16 clockwise. When the probe rod 5 is in the vertical state, the first elastic check unit 16 prevents the probe rod 5 from deflecting in the opposite direction. At the same time, the rod body of the probe rod 5 also contacts the edge of the notch 13. At this time, the probe rod 5 in the vertical state is restricted on both sides by the first elastic check unit 16 and the edge of the notch 13, so that the probe rod 5 in the vertical state is in a locked state that cannot be deflected.

[0053] After the mold assembly 2 is installed on the injection molding machine, and the hook of the overhead crane is disengaged from the hanging port 9, the core rod 10 moves vertically downward within the internal space of the insertion rod 4 under the weight of the core rod 10 and the elastic restoring force of the spring 12.3. The core rod 10 drives the second elastic check unit 17 back to its initial position, and the elastic buffer unit 12 also returns to its natural shape. Since the first elastic check unit 16 is installed on the lever plate 12.2 of the elastic buffer unit 12, under the elastic restoring force of the spring 12.3, the first elastic check unit 16 also retracts into the mounting groove 12.1 along with the lever plate 12.2, thereby disengaging the first elastic check unit 16 from the deflection trajectory line of the protrusion plate 15. Therefore, the probe rod 5 can switch back from the vertical state to the horizontal state, that is, switch to the coaxial state with the insertion rod 4, which is convenient for the next installation and use.

[0054] During the process of switching the probe rod 5 to the horizontal state, the protruding plate 15 needs to deflect counterclockwise. Since the core rod 10 drives the second elastic check unit 17 back to the initial position, the protruding plate 15 passes the second elastic check unit 17 counterclockwise. At this time, the second elastic check unit 17 prevents the probe rod 5 from deflecting in the forward direction. At the same time, the rod body of the probe rod 5 also contacts the other edge of the notch 13. At this time, the two sides of the horizontal probe rod 5 are restricted by the second elastic check unit 17 and the other edge of the notch 13, respectively, so that the horizontal probe rod 5 is in a locked state that cannot be deflected.

[0055] In summary, the probe rod 5 can deflect relative to the mold assembly 2 and has two positions: vertical and horizontal. The vertical position of the probe rod 5 is the usage position, and the horizontal position is the avoidance position, which facilitates the installation of the probe rod 5 on the mold assembly 2 and the placement of the mold assembly 2. Regardless of whether the probe rod 5 is in the vertical or horizontal position, it can be automatically locked. Moreover, the switching of the probe rod 5 from the horizontal to the vertical position is also automatic according to the lifting state of the mold assembly 2. The process of switching from the vertical to the horizontal position is also simple to operate; simply deflect the probe rod 5 clockwise.

[0056] In another embodiment of the present invention, the rigid rod part of the probe rod 5 is a telescopic scale rod. In actual use, the overall length of the probe rod 5 can be determined by referring to the scale. After the length is determined, the telescopic scale rod is locked and fixed, thereby ensuring that when the probe rod 5 in the vertical state contacts the flat part 6, the injection hole of the mold group 2 and the injection nozzle on the injection molding machine 1 are on the same horizontal plane. The specific fixing method can be a screw sleeve or a pin connection. The specific locking and fixing method is the prior art and will not be described in detail.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A precision alignment injection mold for washing machine shell, comprising an injection molding machine (1) and a mold set (2) composed of a front mold and a back mold, characterized in that, Both sides of the mold group (2) are provided with plug-in holes (3), each of which is adapted to plug in a plug-in rod (4), the extending end of the plug-in rod (4) is provided with a distance measuring rod (5) in a vertical state, the injection molding machine (1) is provided with a flat part (6), when the bottom end of the distance measuring rod (5) is in contact with the flat part (6), the injection hole of the mold group (2) is in the same horizontal plane as the injection nozzle of the injection molding machine (1); The top of the mold group (2) is provided with a hanging hole (9) corresponding to the plug-in hole (3), the rod body of the plug-in rod (4) located in the hanging hole (9) can be hooked by a crane hook, the plug-in rod (4) is a hollow pipe column structure, the inside of the plug-in rod (4) is provided with a core rod (10), the rod body of the plug-in rod (4) located in the hanging hole (9) is provided with an opening (11) at the bottom, the crane hook can contact the core rod (10) through the opening (11), the elastic buffer unit (12) is arranged between the core rod (10) and the hollow inner top wall of the plug-in rod (4), which can play a buffering role when the core rod (10) approaches the hollow inner top wall of the plug-in rod (4); The extending end of the plug-in rod (4) is provided with a notch (13) in communication with the outside, one end of the distance measuring rod (5) is connected in the hollow pipe column of the plug-in rod (4) through the notch (13), a locking unit (14) is arranged between the extending end of the distance measuring rod (5) and the hollow inner top wall of the plug-in rod (4), which can lock the distance measuring rod (5) in a vertical state; The locking unit (14) includes an elastic buffer unit (12), a first elastic check unit (16) is mounted on the elastic buffer unit (12), the extending end of the distance measuring rod (5) is fixed with a protruding plate (15), when the distance measuring rod (5) is in a vertical state, the first elastic check unit (16) is engaged with the protruding plate (15) to lock; The end of the core rod (10) is movably provided with a second elastic check unit (17), the check direction of the first elastic check unit (16) is opposite to that of the second elastic check unit (17), the first elastic check unit (16) and the second elastic check unit (17) each include a recessed groove (19) hinged to a mounting object, and a check plate (20) hinged in the recessed groove (19), a return spring (21) is arranged between the check plate (20) and the recessed groove (19), the first elastic check unit (16) and the second elastic check unit (17) are of the same structure; The elastic buffering unit (12) comprises a mounting groove (12.1) opened on the inner top wall of the hollow plug-in rod (4), a lever plate (12.2) is arranged in the mounting groove (12.1), the middle part of the lever plate (12.2) is hinged to the mounting groove (12.1), one end of the lever plate (12.2) is mounted with the first elastic check unit (16), the other end of the lever plate (12.2) is connected with the groove bottom of the mounting groove (12.1) through a spring (12.3), when the core rod (10) contacts with the inner top wall of the hollow plug-in rod (4), the spring (12.3) is compressed and deformed, and the first elastic check unit (16) is engaged with the protruding plate (15) in the locked state.

2. The injection mold for washing machine shell according to claim 1, wherein, The plug-in hole (3) of each side surface of the mold set (2) is two, and the two plug-in holes (3) of each side surface of the mold set (2) are respectively located on the side surface of the front mold and the side surface of the rear mold.

3. The injection mold for washing machine shell according to claim 1, wherein, Two limiting plates (7) parallel to each other are mounted on the plane part (6), when the opposite plate surfaces of the two limiting plates (7) contact the side surface of the distance measuring rod (5) at the same time, the injection hole of the mold set (2) and the injection nozzle of the injection machine (1) are on the same vertical plane.

4. The injection mold for washing machine shell according to claim 2, wherein, The side surface of the mold set (2) is provided with a pulling rod (8), the two ends of the pulling rod (8) are fixed with the corresponding plug-in rod (4), and the pulling rod (8) and the plug-in rod (4) can lock the mold closing state of the mold set (2).

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