Automobile headrest adjustment button injection mold and injection molding method

Abstract

The present invention relates to the technical field of automobile parts injection molds, and in particular to an automobile headrest adjustment button injection mold and an injection molding method thereof; comprising an upper mold base, a lower mold base, an upper mold core and a lower mold core; the lower mold core is movably installed with an ejector assembly, a first slider block and a second slider block, the first slider block and the second slider block can enclose a first molding cavity, and the ejector assembly can enter the first molding cavity; the first slider block is connected to a first cylinder, the first cylinder can push the first slider block to move along a first direction and push the second slider block to move at the same time; a second molding cavity is provided at the bottom of the upper mold core, and when the upper mold core and the lower mold core are molded, the first molding cavity and the second molding cavity can mold a headrest adjustment button. Compared with the prior art, by setting the first slider block and the second slider block, it can be ensured that when the headrest adjustment button is demolded, there will be no jamming problem, thereby improving demolding reliability, demolding efficiency and product yield.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts injection molds, in particular to an automobile headrest adjustment button injection mold and an injection molding method thereof. Background Art

[0002] The headrest guide sleeve (i.e., headrest adjustment button) of a car seat is one of the essential components of a car seat. Its function is to connect the seat back frame and the headrest rod, and to provide support and fixation for the headrest rod. At the same time, in order to realize the up and down adjustment function of the headrest along the torso line, the headrest guide sleeve needs to be provided with a locking and unlocking mechanism.

[0003] In the prior art, the headrest adjustment button includes a main body, which is provided with a through hole for the headrest rod to be movably inserted, and the main body also needs to be provided with an undercut that can be buckled into the seat back frame; for the headrest adjustment button based on the above structure, during the injection molding process, if a one-time injection molding method is adopted, the through hole position and the undercut are easily stuck in the cavity, which makes the demolding reliability of the headrest adjustment button worse, seriously affecting the demolding efficiency and product yield; if a split injection molding method is adopted, since welding or gluing is required later to complete the production of a finished product of a headrest adjustment button, this production method will cause the overall manufacturing process of the headrest adjustment button to become more complicated, seriously limiting the production efficiency, and at the same time affecting the overall strength of the headrest adjustment button, so that the overall service life of the headrest adjustment button is short.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention

[0005] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide an injection mold for a car headrest adjustment button, which effectively solves the technical problems of unreliable demoulding and complex molding process of the car headrest adjustment button in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an injection mold for a car headrest adjustment button, comprising a lower mold base and an upper mold base movably installed on the top of the lower mold base; a lower mold core is installed on the top of the lower mold base, and an upper mold core is installed on the bottom of the upper mold base; the lower mold core is movably installed with an ejector assembly, a first slider block and a second slider block, the first slider block and the second slider block can enclose a first molding cavity, and the ejector assembly can enter the first molding cavity; the first slider block is connected to a first cylinder, and the first cylinder can push the first slider block to move along a first direction and push the second slider block to move at the same time; a second molding cavity is provided at the bottom of the upper mold core, and when the upper mold core and the lower mold core are molded together, the first molding cavity and the second molding cavity can mold the headrest adjustment button.

[0007] The beneficial effect of the automobile headrest adjustment button injection mold provided by the present application is that: compared with the prior art, by setting the first row block and the second row block, the first row block and the second row block can enclose the first molding cavity, and when the upper mold core and the lower mold core are completed, the headrest adjustment button can be injection molded by using the first molding cavity and the second molding cavity; during subsequent demolding, the upper mold core and the lower mold core are first opened, and then the side of the headrest adjustment button is demolded by using the displacement cooperation of the first row block and the second row block, and the headrest adjustment button does not need to be ejected, which can ensure that the headrest adjustment button will not get stuck when demolding, thereby improving demolding reliability, demolding efficiency and product yield; at the same time, there is no need to perform split injection molding of the headrest adjustment button, which is conducive to simplifying the molding process and improving the overall strength and production efficiency of the product.

[0008] As a preferred solution: the upper mold base is equipped with a pouring port, the upper mold core is provided with a sol flow channel connected to the pouring port, and the other end of the sol flow channel is conductively connected to the second molding cavity.

[0009] As a preferred solution: the first cylinder is installed on the right side of the lower mold core, and the telescopic rod of the first cylinder is connected to the first slider block; when the telescopic rod of the first cylinder is extended, it can drive the first slider block to move in the first direction, and the first slider block simultaneously acts on the second slider block to move in the first direction; when the telescopic rod of the first cylinder is retracted, it can drive the first slider block to move in the second direction and reset.

[0010] As a preferred solution: the second slider block is connected to a second guide rod, the other end of the second guide rod is movably installed on the lower mold core, and the second guide rod sleeve is provided with a second rubber block. When the first slider block cancels the action of the second slider block, the second rubber block can provide an elastic force for the second slider block to move in the second direction.

[0011] As a preferred solution: the lower mold core is provided with a first stop rod, and the bottom of the second positioning block is provided with a first stop hole for inserting the first stop rod; when the second positioning block is displaced along the first direction, the first stop rod can be inserted into the first stop hole to limit the movement of the second positioning block.

[0012] As a preferred solution: the second row block is provided with a blowing channel, which can penetrate the side of the second row block facing the first molding cavity; injecting gas into the blowing channel can provide air pressure to separate the headrest adjustment button from the second row block.

[0013] As a preferred solution: a first positioning hole is provided on the top of the first positioning block and the second positioning block, and a first positioning column capable of being inserted into the first positioning hole is provided on the bottom of the upper mold core.

[0014] As a preferred solution: the ejector assembly includes

[0015] A first movable plate is movably mounted on the lower mold core;

[0016] A plurality of first forming wedge blocks, wherein the bottom of each first forming wedge block is rotatably mounted on the first movable plate;

[0017] When the first movable plate moves upward, a plurality of first forming wedges can enter the forming cavity;

[0018] When the upper die core is molded with the lower die core, the upper die core can act on the first forming wedge block to move outwards.

[0019] As a preferred solution: the ejector assembly further comprises a second movable plate, the first movable plate and the second movable plate are arranged up and down, and the second movable plate is provided with a second pull rod;

[0020] When the second movable plate moves downward, the second pull rod can pull the tops of the plurality of first forming wedge blocks to move toward the center position.

[0021] The present application also provides an injection molding method of an automobile headrest adjustment button injection mold, comprising the above-mentioned automobile headrest adjustment button injection mold, and the injection molding method comprises the following steps:

[0022] Step 1: Provide the lower mold base and the upper mold base and install them on the injection molding machine;

[0023] Step 2: Start the first cylinder to drive the first positioning block to move in the second direction to ensure that the first positioning block is in the initial position; at the same time, cancel the first stop rod to stop the second positioning block, so that the second positioning block is displaced and reset in the second direction, so that the first positioning block and the second positioning block surround the first molding cavity;

[0024] Step 3: driving the second movable plate to move upward, so that the plurality of first forming wedges enter the first forming cavity;

[0025] Step 4: Start the injection molding machine, drive the upper mold seat to move relative to the lower mold seat, so that the upper mold core and the lower mold core are molded together, and at the same time, the upper mold core stops the first molding wedges and moves outward;

[0026] Step 5: providing hot melt slurry, injecting it from the pouring port and flowing it through the sol flow channel into the first molding cavity and the second molding cavity;

[0027] Step 6: After the hot melt slurry is injected, let it stand for 30S-50S to allow the hot melt slurry to solidify and form the headrest adjustment button.

[0028] Step 7: The second movable plate is moved downward, the second pull rod is moved downward synchronously and the tops of the plurality of first forming wedges are pulled toward the center to complete demoulding of the inner hole of the headrest adjustment button; the second movable plate is continued to be moved to pull the plurality of first forming wedges out of the position of the first forming cavity;

[0029] Step 8: Start the first cylinder, the telescopic rod of the first cylinder extends to push the first slider block to move along the first direction, and the first slider block pushes the second slider block to move along the first direction;

[0030] Step 9: The first stop rod is moved upward and inserted into the first stop hole to limit the second positioning block;

[0031] Step 10: Continue to start the first cylinder, and the telescopic rod of the first cylinder retracts to pull the first slider block to move along the second direction, completing the first side demoulding of the headrest adjustment button;

[0032] Step 11: Inject gas into the blowing channel of the second row of blocks, and use air pressure to separate the headrest adjustment button from the second row of blocks to complete the second side demoulding and unloading;

[0033] Step 12: Repeat steps 2-11 to continue injection molding the headrest adjustment button.

[0034] The beneficial effect of the injection molding method of the automobile headrest adjustment button injection mold provided by the present application is that: compared with the prior art, after the automobile headrest adjustment button injection mold is used to injection mold the headrest adjustment button, first, the tops of multiple first molding wedges are pulled toward the center position to complete the demolding operation of the inner hole of the headrest adjustment button; then, after the multiple first molding wedges are operated to withdraw from the position of the first molding cavity, the first row of blocks and the second row of blocks are displaced and coordinated to complete the demolding operation on both sides of the headrest adjustment button; such a structure can ensure that during the demolding process of the headrest adjustment button, the undercut of the headrest adjustment button will not be stuck in the cavity of the lower mold core, which is beneficial to improving the demolding reliability, demolding efficiency and product yield of the headrest adjustment button during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the injection mold of the automobile headrest adjustment button provided in an embodiment of the present application;

[0037] Figure 2 yes Figure 1 A first cross-sectional view of the injection mold for the automotive headrest adjustment button is shown;

[0038] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0039] Figure 4 yes Figure 3 A top view of the plurality of first forming wedges shown when they are spread apart;

[0040] Figure 5 yes Figure 2 A schematic diagram of a state in which an upper mold core in an injection mold for an automobile headrest adjustment button is opened and a plurality of first molding wedges exit a first molding cavity;

[0041] Figure 6 yes Figure 5 A schematic diagram showing a state where a first row of blocks and a second row of blocks are displaced along a first direction;

[0042] Figure 7 yes Figure 6 A schematic diagram of a state in which the first row of bit blocks is displaced along the second direction;

[0043] Figure 8 yes Figure 6 The schematic diagram of the state in which the first stop rod stops the second positioning block is shown.

[0044] Among them, the reference numerals in the figure are:

[0045] 10. Lower die base; 11. Lower die core; 12. Ejector assembly; 121. First moving plate; 122. First forming wedge block; 123. Second moving plate; 124. Second pull rod; 125. Rubber strip; 126. Second air cylinder; 127. First buffer block; 13. First slider block; 131. First air cylinder; 132. First positioning hole; 14. Second slider block; 141. Second guide rod; 142. Second rubber block; 143. First ejector hole; 144. Air blowing channel; 15. First forming cavity; 16. First ejector rod;

[0046] 20. upper mold base; 201. pouring port; 21. upper mold core; 22. second molding cavity; 23. sol flow channel; 24. first positioning column; 25. first convex portion;

[0047] 30. Headrest adjustment button; 31. Hole position; 32. Rod; 33. Undercut; 34. Head;

[0048] x1, first direction; x2, second direction. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0051] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing 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 therefore should not be understood as a limitation on the present application.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0054] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first described.

[0055] The headrest adjustment button used in car seats usually includes a head, a rod, and an undercut on the rod. Both the head and the rod are penetrated with through holes for the telescopic rod of the headrest to be inserted, and the undercut is used to buckle into the installation hole of the car seat. The rod and the through hole of the headrest adjustment button are both vertical surfaces. If the headrest adjustment button is molded by one-time injection molding, due to the setting of the vertical surface, its demoulding reliability is very poor and it is easy to get stuck. At the same time, due to the setting of the undercut, it will also get stuck during the demoulding process.

[0056] In the prior art, in order to solve the problem of sticking, a split injection molding headrest adjustment button semi-finished product is usually used, and then the headrest adjustment button is made by gluing or welding. This process is complicated, and the headrest adjustment button has low strength and is easily damaged.

[0057] Please also read Figures 1 to 8 The injection mold of the automobile headrest adjustment button 30 provided in the embodiment of the present application is now described. The injection mold of the automobile headrest adjustment button 30 includes: a lower mold base 10 and an upper mold base 20.

[0058] The lower mold base 10 and the upper mold base 20 are used to be installed in an injection molding machine. The lower mold core 11 is installed on the top of the lower mold base 10, and the upper mold core 21 is installed on the bottom of the upper mold base 20; the injection molding machine can drive the upper mold base 20 to move closer or farther relative to the lower mold base 10 to complete the closing or opening of the upper mold core 21 and the lower mold core 11. The lower mold core 11 is movably installed with an ejector assembly 12, a first slider block 13 and a second slider block 14. The first slider block 13 and the second slider block 14 can enclose a first molding cavity 15, and the ejector assembly 12 can enter the first molding cavity 15; the first slider block 13 is connected to the first cylinder 131, and the first cylinder 131 can push the first slider block 13 to move along the first direction x1 and push the second slider block 14 to move at the same time; a second molding cavity 22 is provided at the bottom of the upper mold core 21. When the upper mold core 21 and the lower mold core 11 are molded together, the first molding cavity 15 and the second molding cavity 22 can form the headrest adjustment button 30.

[0059] It should be noted here that the headrest adjustment button 30 includes a head, a rod, a buckle and an inner hole. The first molding cavity is used to mold the rod, multiple first molding wedges are used to mold the inner hole, the first molding wedges and the first molding cavity can form an inverted buckle, and the second molding cavity is used to mold the head.

[0060] Specifically, by setting the first row block 13 and the second row block 14, the first row block 13 and the second row block 14 can enclose the first molding cavity 15. After the upper mold core 21 and the lower mold core 11 are molded together, the first molding cavity 15 and the second molding cavity 22 can be used for injection molding the headrest adjustment button 30; during subsequent demolding, the upper mold core 21 and the lower mold core 11 are first opened, and then the side of the headrest adjustment button 30 is demolded by using the displacement coordination of the first row block 13 and the second row block 14. There is no need to eject the headrest adjustment button 30, which can ensure that the headrest adjustment button 30 will not get stuck when demolding, thereby improving demolding reliability, demolding efficiency and product yield; at the same time, there is no need to perform split injection molding of the headrest adjustment button 30, which is conducive to simplifying the molding process and improving the overall strength and production efficiency of the product.

[0061] In more detail, the upper mold base 20 is provided with a pouring port 201, and the upper mold core 21 is provided with a sol flow channel 23 connected to the pouring port 201, and the other end of the sol flow channel 23 is conductively connected to the second molding cavity 22. During operation, the pouring port 201 is connected to the injection molding machine, and the hot melt slurry enters the sol flow channel 23 through the pouring port 201 through the injection molding machine, and flows through the sol flow channel 23 to fill the first molding cavity 15 and the second molding cavity 22. After the hot melt slurry is cooled, the headrest adjustment button 30 can be formed.

[0062] In some embodiments of the present application, the first cylinder 131 is installed on the right side of the lower mold core 11, and the telescopic rod of the first cylinder 131 is connected to the first slider block 13; when the telescopic rod of the first cylinder 131 is extended, it can drive the first slider block 13 to move along the first direction x1, and the first slider block 13 simultaneously acts on the second slider block 14 to move along the first direction x1; when the telescopic rod of the first cylinder 131 is retracted, it can drive the first slider block 13 to move and reset along the second direction x2.

[0063] Specifically, the second positioning block 14 is connected to a second guide rod 141, the other end of which is movably mounted on the lower mold core 11, and the second guide rod 141 is sleeved with a second rubber block 142. When the first positioning block 13 cancels the action on the second positioning block 14, the second rubber block 142 can provide an elastic force for the second positioning block 14 to move in the second direction x2. The lower mold core 11 is provided with a first stop rod 16, and the bottom of the second positioning block 14 is provided with a first stop hole 143 for the first stop rod 16 to be inserted; when the second positioning block 14 is displaced along the first direction x1, the first stop rod 16 can be inserted into the first stop hole 143 to limit the movement of the second positioning block 14. The first stop rod 16 can be connected to a cylinder, and driven by the cylinder to move up and down, thereby realizing automatic control of the first stop rod 16 to insert or withdraw from the first stop hole 143.

[0064] In more detail, when the headrest adjustment button 30 is demolded, the first cylinder 131 is first used to push the first position block 13 and the second position block 14 to move in the first direction, and then the first stop rod 16 is inserted into the first stop hole 143 to limit the movement of the second position block 14; then the telescopic rod of the first cylinder 131 is retracted to drive the first position block 13 to move in the second direction, so that the first position block 13 is reset. In this process, the headrest adjustment button 30 can be separated from the first position block 13 to achieve the first side demolding.

[0065] Next, the second row block 14 is provided with a blowing channel 144, which can penetrate the side of the second row block 14 facing the first molding cavity 15; injecting gas into the blowing channel 144 can provide air pressure to separate the headrest adjustment button 30 from the second row block 14; with such a structure, the headrest adjustment button can be separated from the second row block 14 by blowing directly, and the second side demolding is completed to cut the headrest adjustment button 30. It can be seen that the side demolding of the headrest adjustment button 30 can be completed by coordinating the movement of the first row block 13 and the second row block 14, without the need for upper and lower ejection methods, which effectively solves the problem of jamming in the upper ejection in the traditional technology, thereby improving the reliability of product demolding and the yield of the product.

[0066] In some other embodiments of the present application, the tops of the first row block 13 and the second row block 14 are both provided with a first positioning hole 132, and the bottom of the upper mold core 21 is provided with a first positioning column 24 that can be inserted into the first positioning hole 132. When the upper mold core 21 and the lower mold core 11 are molded together, only when the first row block 13 and the second row block 14 are in the initial state, the first positioning column 24 can be inserted into the first positioning hole 132, so that the upper mold core 21 and the lower mold core 11 can be molded together smoothly; once the first row block 13 and the second row block 14 are in a non-initial state, the upper mold core 21 and the lower mold core 11 cannot be molded together; such a structure can ensure the mold-closing reliability of the upper mold core 21 and the lower mold core 11, and prevent the problem that the headrest adjustment button 30 cannot be formed normally due to the position deviation of the first row block 13 and the second row block 14.

[0067] Preferably, the front and rear sides of the lower mold core are both provided with a first guide groove, and the first row block and the second row block are both provided with a first guide protrusion that can be moved and restricted by the first guide groove; by using the first guide protrusion to be movably restricted in the first guide groove, it can be ensured that the first row block and the second row block can only be displaced along the first direction or along the second direction.

[0068] In some other embodiments of the present application, the ejector pin assembly 12 includes at least a first movable plate 121 and a plurality of first molding wedges 122; the first movable plate 121 is movably mounted on the lower mold core 11, and the bottom of each first molding wedge 122 is rotatably mounted on the first movable plate 121; when the first movable plate 121 moves upward, the plurality of first molding wedges 122 can enter the first molding cavity 15; when the upper mold core 21 is molded with the lower mold core 11, the upper mold core 21 can act on the first molding wedge 122 to move outward.

[0069] During operation, when the first row block 13 and the second row block 14 move to the initial state and surround the first molding cavity 15, the first movable plate 121 can push up to drive the plurality of first molding wedge blocks 122 to enter the first molding cavity 15, and the upper mold core 21 is provided with a first convex portion 25 in the second molding cavity 22. The first convex portion 25 can abut against the inner side of the plurality of first molding wedge blocks 122 and act on the plurality of first molding wedge blocks 122 to move outward and open, thereby forming a molding structure for molding the inner hole 31 of the headrest adjustment button 30.

[0070] Preferably, the ejector assembly 12 also includes a second movable plate 123, the first movable plate 121 and the second movable plate 123 are arranged up and down, and the second movable plate 123 is provided with a second pull rod 124; when the second movable plate 123 moves downward, the second pull rod 124 can pull the tops of the multiple first molding wedge blocks 122 to move toward the center position, so that the tops of the multiple first molding wedge blocks 122 are tilted relative to the bottom toward the center direction, completing the demolding of the inner hole 31 of the headrest adjustment button 30. At this time, the second movable plate 123 continues to move downward, and the multiple first molding wedge blocks 122 can be withdrawn from the first molding cavity 15, and then the side demolding operations of the headrest adjustment button 30 can be performed twice.

[0071] It should be noted here that the second movable plate 123 extends forward and backward to protrude from the position of the lower mold core 11, and second cylinders 126 are installed on the front and rear surfaces of the outer side of the lower mold core 11, and the two second cylinders 126 are arranged one by one corresponding to the two ends of the second movable plate 123; during operation, the two second cylinders 126 are extended and retracted at the same time to drive the second movable plate 123 to move up or down, so as to complete the entry or exit of multiple first molding wedges 122 into or out of the first molding cavity 15.

[0072] In more detail, a rubber strip 125 is connected between the second pull rod 124 and each first forming wedge block 122. The rubber strip 125 is connected to a position close to the top of each forming wedge block. When the second movable plate 123 moves downward, the second pull rod 124 moves downward synchronously, and the rubber strip 125 pulls the top of each first forming wedge block 122 to tilt and swing relative to the bottom, thereby achieving a variable diameter effect of each first forming wedge block 122, that is, when multiple first forming wedge blocks 122 move outward and expand, multiple first forming wedge blocks 122 are at the maximum diameter. When the plurality of first molding wedge blocks 122 are moved inward and reduced in size, the plurality of first molding wedge blocks 122 are at their minimum diameters. At this time, the two ends of the two adjacent first molding wedge blocks 122 are not pressed against each other, which is used to demold the inner hole 31 of the headrest adjustment button 30 and provide avoidance, thereby ensuring that the plurality of first molding wedge blocks 122 will not get stuck in the inner hole 31 of the headrest adjustment button 30 during the process of exiting the first molding cavity 15.

[0073] It should be noted here that a first inclined surface is provided on the top of each first molding wedge block 122, and a second inclined surface matched with the first inclined surface is provided on the side of the first protrusion 25. When the upper mold core 21 and the lower mold core 11 are molded, the first protrusion 25 can be inserted into multiple first molding wedge blocks 122. Through the mutual fit between the first inclined surface and the second inclined surface, the multiple first molding wedge blocks 122 can be guided to swing outward and open, and form a circular structure for forming the inner hole 31 of the headrest adjustment button 30.

[0074] In some other embodiments of the present application, a first buffer block 127 is provided on the top of the second movable plate 123. The setting of the first buffer block 127 can prevent the first movable plate 121 from impacting the second movable plate 123 when the first pull rod pulls the multiple first forming wedge blocks 122, thereby improving the reliability of use.

[0075] The present application also provides an injection molding method of an injection molding mold for an automobile headrest adjustment button 30, including an injection molding mold for an automobile headrest adjustment button 30; the injection molding method comprises the following steps:

[0076] Step 1: Provide a lower mold base 10 and an upper mold base 20 and install them on an injection molding machine;

[0077] Step 2: Start the first cylinder 131 to drive the first slider block 13 to move along the second direction x2, ensuring that the first slider block 13 is in the initial position; at the same time, cancel the first stop rod 16 to stop the second slider block 14, so that the second slider block 14 is displaced and reset along the second direction x2, so that the first slider block 13 and the second slider block 14 surround the first molding cavity 15;

[0078] Step 3: driving the second movable plate 123 to move upward, so that the plurality of first forming wedges 122 enter the first forming cavity 15;

[0079] Step 4: Start the injection molding machine, drive the upper mold base 20 to move relative to the lower mold base 10, so that the upper mold core 21 and the lower mold core 11 are molded together, and at the same time, the upper mold core 21 stops the plurality of first molding wedge blocks 122 and moves outward;

[0080] Step 5: providing hot melt slurry, injecting it from the pouring port 201 and flowing through the sol flow channel 23 into the first molding cavity 15 and the second molding cavity 22;

[0081] Step 6: After the hot melt slurry is injected, it is left to stand for 30 seconds to 50 seconds to allow the hot melt slurry to solidify and form the headrest adjustment button 30;

[0082] Step 7: The second movable plate 123 is moved downward, and the second pull rod 124 is moved downward synchronously and pulls the tops of the plurality of first forming wedge blocks 122 to move toward the center, thereby completing demolding of the inner hole 31 of the headrest adjustment button 30; the second movable plate 123 is continued to move, and the plurality of first forming wedge blocks 122 are pulled out of the position of the first forming cavity 15;

[0083] Step 8: Start the first cylinder 131, and the telescopic rod of the first cylinder 131 extends to push the first slider block 13 to move along the first direction x1, and at the same time, the first slider block 13 pushes the second slider block 14 to move along the first direction x1;

[0084] Step 9: The first stop rod 16 moves upward and is inserted into the first stop hole 143 to limit the second positioning block 14;

[0085] Step 10: Continue to start the first cylinder 131, and the telescopic rod of the first cylinder 131 retracts to pull the first slider block 13 to move along the second direction x2, completing the first side demoulding of the headrest adjustment button 30;

[0086] Step 11: Inject gas into the blowing channel 144 of the second row block 14, and use the gas pressure to separate the headrest adjustment button 30 from the second row block 14 to complete the second side demoulding and unloading;

[0087] Step 12: Repeat steps 2-11 to continuously injection-mold the headrest adjustment button 30 .

[0088] It should be noted that, since the undercuts 33 of the headrest adjustment button are disposed on both sides of the rod 32 , the first molding wedge block 122 , the first slider block 13 and the second slider block 14 are all provided with corresponding cavities for molding the undercuts 33 .

[0089] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An injection mold for an automobile headrest adjustment button, comprising a lower mold base (10) and an upper mold base (20) movably mounted on the top of the lower mold base (10); a lower mold core (11) is mounted on the top of the lower mold base (10), and an upper mold core (21) is mounted on the bottom of the upper mold base (20); Features: The lower mold core (11) is movably mounted with an ejector assembly (12), a first positioning block (13) and a second positioning block (14); the first positioning block (13) and the second positioning block (14) are capable of surrounding a first molding cavity (15); the ejector assembly (12) is capable of entering the first molding cavity (15); the first positioning block (13) is connected to a first cylinder (131); the first cylinder (131) is capable of pushing the first positioning block (13) to move along a first direction (x1) and simultaneously pushing the second positioning block (14) to move; A second molding cavity (22) is provided at the bottom of the upper mold core (21); when the upper mold core (21) and the lower mold core (11) are molded together, the first molding cavity (15) and the second molding cavity (22) are capable of molding a headrest adjustment button (30); The ejector pin assembly (12) comprises A first movable plate (121) is movably mounted on the lower mold core (11); a plurality of first forming wedge blocks (122), wherein the bottom of each first forming wedge block (122) is rotatably mounted on the first movable plate (121); and, A second movable plate (123), the first movable plate (121) and the second movable plate (123) are arranged up and down, and the second movable plate (123) is provided with a second pull rod (124); When the first movable plate (121) moves upward, the plurality of first molding wedges (122) can enter the molding cavity (15); When the upper mold core (21) and the lower mold core (11) are molded together, the upper mold core (21) can act on the first molding wedge block (122) to move outwards; When the second movable plate (123) moves downward, the second pull rod (124) can pull the tops of the plurality of first forming wedge blocks (122) to move toward a central position.

2. The automobile headrest adjustment button injection mold according to claim 1, characterized in that: The upper mold base (20) is provided with a pouring port (201), the upper mold core (21) is provided with a sol flow channel (23) in communication with the pouring port (201), and the other end of the sol flow channel (23) is in conduction connection with the second molding cavity (22).

3. The automobile headrest adjustment button injection mold according to claim 2, characterized in that: The first cylinder (131) is installed on the right side of the lower mold core (11), and the telescopic rod of the first cylinder (131) is connected to the first sliding block (13); When the telescopic rod of the first cylinder (131) is extended, it can drive the first slider block (13) to move along the first direction (x1), and the first slider block (13) simultaneously acts on the second slider block (14) to move along the first direction (x1); When the telescopic rod of the first cylinder (131) is retracted, it can drive the first positioning block (13) to move and reset along the second direction (x2).

4. The automobile headrest adjustment button injection mold according to claim 3, characterized in that: The second positioning block (14) is connected to a second guide rod (141), the other end of the second guide rod (141) is movably mounted on the lower mold core (11), and the second guide rod (141) is sleeved with a second rubber block (142). When the first positioning block (13) cancels the action on the second positioning block (14), the second rubber block (142) can provide the second positioning block (14) with an elastic force for displacement in a second direction (x2).

5. The automobile headrest adjustment button injection mold according to claim 3 or 4, characterized in that: The lower mold core (11) is provided with a first top stop rod (16), and the bottom of the second positioning block (14) is provided with a first top stop hole (143) for inserting the first top stop rod (16); when the second positioning block (14) is displaced along a first direction (x1), the first top stop rod (16) can be inserted into the first top stop hole (143) to limit the movement of the second positioning block (14).

6. The automobile headrest adjustment button injection mold according to claim 5, characterized in that: The second positioning block (14) is provided with a blowing channel (144), and the blowing channel (144) can penetrate a side surface of the second positioning block (14) facing the first molding cavity (15); injecting gas into the blowing channel (144) can provide air pressure to separate the headrest adjustment button (30) from the second positioning block (14).

7. The automobile headrest adjustment button injection mold according to claim 1, characterized in that: The tops of the first positioning block (13) and the second positioning block (14) are both provided with first positioning holes (132), and the bottom of the upper mold core (21) is provided with first positioning columns (24) capable of being inserted into the first positioning holes (132).

8. An injection molding method for an automobile headrest adjustment button injection mold, comprising the automobile headrest adjustment button injection mold as claimed in claim 6, characterized in that: The injection molding method comprises the following steps: Step 1: Provide a lower mold base (10) and an upper mold base (20), and install them on an injection molding machine; Step 2: Start the first air cylinder (131) to drive the first positioning block (13) to move along the second direction (x2) to ensure that the first positioning block (13) is in the initial position; at the same time, remove the first stop rod (16) to stop the second positioning block (14), so that the second positioning block (14) is displaced and reset along the second direction (x2), so that the first positioning block (13) and the second positioning block (14) surround the first molding cavity (15); Step 3: driving the second movable plate (123) to move upward, so that the plurality of first molding wedges (122) enter the first molding cavity (15); Step 4: starting the injection molding machine, driving the upper mold base (20) to move relative to the lower mold base (10), allowing the upper mold core (21) to close the mold with the lower mold core (11), and at the same time, the upper mold core (21) stops the plurality of first molding wedge blocks (122) from moving outwards; Step 5: providing hot melt slurry, injecting it from the pouring port (201) and flowing it through the sol flow channel (23) into the first molding cavity (15) and the second molding cavity (22); Step 6: After the hot melt slurry is injected, the hot melt slurry is left to stand for 30 seconds to 50 seconds to allow the hot melt slurry to solidify and form the headrest adjustment button (30); Step 7: The second movable plate (123) is moved downward, and the second pull rod (124) is simultaneously moved downward and pulls the tops of the plurality of first forming wedge blocks (122) to move toward the center, thereby completing demoulding of the inner hole (31) of the headrest adjustment button (30); the second movable plate (123) is continued to be moved, and the plurality of first forming wedge blocks (122) are pulled out of the position of the first forming cavity (15); Step 8: Start the first cylinder (131), and the telescopic rod of the first cylinder (131) extends to push the first slider block (13) to move along the first direction (x1), and at the same time, the first slider block (13) pushes the second slider block (14) to move along the first direction (x1); Step 9: The first stop rod (16) is moved upward and inserted into the first stop hole (143) to limit the second positioning block (14); Step 10: Continue to start the first cylinder (131), and the telescopic rod of the first cylinder (131) is retracted to pull the first positioning block (13) to move along the second direction (x2), thereby completing the first side demoulding of the headrest adjustment button (30); Step 11: Inject gas into the blowing channel (144) of the second row block (14), and use the gas pressure to separate the headrest adjustment button (30) from the second row block (14) to complete the second side demoulding and unloading. Step 12: Repeat steps 2-11 to continuously injection mold the headrest adjustment button (30).

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