Anti-deformation injection mold for preparing tubular thin-wall product

Abstract

The utility model relates to the technical field of injection molding of tubular thin-wall products, and discloses an anti-deformation injection mold for preparing tubular thin-wall products, which is used for injection molding of tubular thin-wall products and comprises a base and a movable mold top plate connected with an injection molding machine, a fixed mold bottom plate is arranged at the top end of the base, and a lower mold seat is arranged in the fixed mold bottom plate. A movable mold plate is arranged at the bottom end of the movable mold top plate, and a temperature adjusting mechanism is arranged in the fixed mold bottom plate. According to the anti-deformation injection mold for preparing the tubular thin-wall product, through cooperation of the cooling air pump and the heating air pump and flexible positioning of the air spraying pipe, the temperature of the lower mold base can be adjusted. The temperature control mechanism effectively avoids injection molding failures caused by too high or too low temperature, such as product deformation and incomplete injection molding. The deformation risk caused by unstable environment in the forming process is reduced by ensuring that the temperature of the lower mold base is within a proper range and the action of airflow, and the stability and success rate of the injection molding process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular thin-wall product injection molding, in particular to an anti-deformation injection molding mold for preparing tubular thin-wall products. Background Art

[0002] Plastic injection molds are tools for producing plastic products and are widely used. In order to meet the production needs of high-precision and low-deformation tubular thin-walled products, injection molds that prevent deformation of tubular thin-walled products have appeared on the market.

[0003] For example, the tubular thin-walled anti-deformation injection mold disclosed in the Chinese patent authorization publication number CN217414761U, when the mold is opened, the fixed mold insert and the movable mold insert are used to fix the product under the action of the insert spring, and the large slider presses the product. When the core on the small slider is separated from the product's clamping force, the large slider is separated from the product. Since the product is pressed by the fixed mold insert, the movable mold insert and the large slider before it is removed from the core, the deformation of the product is reduced. However, although the existing device reduces the deformation problem of the product during the mold opening process to a certain extent, it still has some shortcomings. Specifically, the existing technology mainly relies on mechanical structures to fix and press the product to ensure its stability during the process of removing the core. However, this method requires high accuracy of temperature control, but in actual operation, the temperature of the mold is often difficult to be accurately and timely adjusted. Too high a temperature may cause incomplete injection molding or deformation of the product, while too low a temperature may affect the fluidity and molding effect of the injection molding material. In addition, the existing technology lacks effective and uniform auxiliary means during the cooling and solidification process after product molding, and is easily affected by environmental factors, resulting in unstable product surface quality and even deformation. Utility Model Content

[0004] The utility model aims to provide an anti-deformation injection mold for preparing tubular thin-walled products. By ensuring that the temperature of the lower mold base is within an appropriate range, the stability and success rate of the injection molding process are significantly improved, and the problem of deformation during the preparation of tubular thin-walled products is avoided.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-deformation injection mold for preparing tubular thin-walled products, which is used for the injection molding of tubular thin-walled products, and comprises a base and a movable mold top plate connected to an injection molding machine, a fixed mold bottom plate is arranged at the top of the base, a lower mold seat is arranged in the fixed mold bottom plate, a movable mold plate is arranged at the bottom end of the movable mold top plate, and a temperature regulating mechanism is arranged in the fixed mold bottom plate for changing the temperature in the lower mold seat to avoid deformation during the injection molding of tubular thin-walled products.

[0006] The temperature regulation mechanism includes a temperature control component, and the temperature control component includes a heating air pump and a cooling air pump arranged in the fixed mold bottom plate. The air outlet end of the heating air pump is communicated with a first air outlet pipe, and the air outlet end of the cooling air pump is provided with a second air outlet pipe. The first air outlet pipe and the second air outlet pipe are externally communicated with an air injection pipe for blowing air into the lower mold base.

[0007] The temperature regulation mechanism further includes an adjustment component for adjusting the position of the air injection pipe. The adjustment component includes a first mounting bracket arranged in the fixed mold bottom plate. A slider is movably arranged in the first mounting bracket, and a positioning frame is movably arranged outside the slider. The air injection pipe is arranged inside the positioning frame.

[0008] Preferably, the adjustment component includes a connecting gear movably arranged on the side of the positioning frame away from the slider. A second mounting bracket is also arranged in the fixed mold bottom plate, and a rack plate that can mesh with the connecting gear is fixed outside the second mounting bracket.

[0009] Preferably, the adjustment component further includes a mounting seat arranged at the bottom end of the first mounting bracket. A first motor is arranged in the mounting seat, and a threaded rod is drivingly connected to the output shaft of the first motor. The threaded rod is in threaded connection with the slider.

[0010] Preferably, two groups of limiting rods are arranged in the first mounting bracket. The two groups of limiting rods are symmetrically arranged beside the threaded rod, and through holes for the limiting rods to penetrate are formed in the slider.

[0011] Preferably, the temperature control component further includes a control valve arranged outside the first air outlet pipe for controlling the opening and closing of the first air outlet pipe. The first air outlet pipe is communicated with the second air outlet pipe.

[0012] Preferably, a telescopic pipe is communicated outside the second air outlet pipe, and the air injection pipe is arranged on the side of the telescopic pipe away from the second air outlet pipe.

[0013] Preferably, an auxiliary positioning component for positioning the tubular thin-walled product is arranged in the fixed mold bottom plate to prevent the tubular thin-walled product from being misaligned and deformed during the molding process. The auxiliary positioning component includes a first positioning block and a second positioning block arranged in the fixed mold bottom plate. A sliding rod is slidably arranged in the fixed mold bottom plate. A return spring is sleeved outside the sliding rod, and the sliding rod is connected to the second positioning block on the side close to the second positioning block.

[0014] Preferably, the auxiliary positioning component further includes a top rod arranged at the bottom end of the moving template, and inclined grooves for the top rod to be inserted are formed at the top ends of the first positioning block and the second positioning block.

[0015] Compared with the prior art, the present invention provides an anti-deformation injection mold for preparing tubular thin-walled products, and has the following beneficial effects:

[0016] 1. The anti-deformation injection mold for preparing the tubular thin-walled product can adjust the temperature of the lower mold base through the cooperation of the cooling air pump and the heating air pump, and the flexible positioning of the air injection pipe (realized by components such as the first motor, the threaded rod, the slider, the positioning frame, the connecting gear, and the rack plate). This temperature control mechanism effectively avoids injection molding failures caused by too high or too low temperatures, such as product deformation, incomplete injection molding, etc. By ensuring that the temperature of the lower mold base is within an appropriate range, the stability and success rate of the injection molding process are significantly improved;

[0017] 2. After the injection molding is completed, the anti-deformation injection mold for preparing the tubular thin-walled product can blow the surface of the tubular thin-walled product by using the air injection pipe. This operation not only helps to quickly cool and solidify the product, but also reduces the risk of deformation caused by unstable environments (such as temperature fluctuations, humidity changes) during the molding process through the action of the air flow. At the same time, the lifting and flipping design of the air injection pipe makes the blowing process more uniform and comprehensive, further accelerating the molding speed of the product and maintaining the shape and dimensional stability of the product. This effect complements the control of the temperature of the lower mold base, jointly improving the quality and production efficiency of the tubular thin-walled product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model;

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model Figure 1 ;

[0020] Figure 3 It is a partial structural schematic diagram of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model Figure 2 ;

[0021] Figure 4 It is an enlarged structural schematic diagram of part A of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model;

[0022] Figure 5 It is a disassembled structural schematic diagram of the temperature adjustment mechanism of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model;

[0023] Figure 6 It is a partial three-dimensional structural schematic diagram of the temperature adjustment mechanism of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the auxiliary positioning component of an anti-deformation injection mold for preparing a tubular thin-walled product of the present utility model.

[0025] In the figure: 1. Base; 11. Tubular thin-walled product; 21. Fixed mold bottom plate; 22. Lower mold base; 31. Moving mold top plate; 32. Moving mold plate; 4. Temperature adjustment mechanism; 41. Temperature control component; 411. Heating air pump; 412. First air outlet pipe; 413. Cooling air pump; 414. Second air outlet pipe; 415. Control valve; 416. Telescopic pipe; 417. Air injection pipe; 42. Adjustment component; 421. First mounting bracket; 422. Slide block; 423. Positioning frame; 424. Connecting gear; 425. Second mounting bracket; 426. Rack plate; 427. Mounting seat; 428. First motor; 429. Threaded rod; 4210. Limiting rod; 5. Auxiliary positioning component; 51. Ejector rod; 52. First positioning block; 53. Second positioning block; 54. Oblique groove; 55. Slide rod; 56. Return spring. Detailed implementation mode

[0026] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation modes.

[0027] Embodiment 1: Please refer to Figures 1-6 , the present invention provides a technical solution: an anti-deformation injection mold for preparing a tubular thin-walled product, used for injecting the tubular thin-walled product 11, including a base 1 and a moving mold top plate 31 connected to an injection molding machine. A fixed mold bottom plate 21 is arranged at the top end of the base 1, a lower mold base 22 is arranged in the fixed mold bottom plate 21, a moving mold plate 32 is arranged at the bottom end of the moving mold top plate 31, and a temperature adjustment mechanism 4 for changing the temperature in the lower mold base 22 to avoid deformation of the tubular thin-walled product 11 during injection molding is arranged in the fixed mold bottom plate 21. By setting the temperature adjustment mechanism 4, the temperature of the lower mold base 22 can be accurately controlled, effectively avoiding the deformation of the tubular thin-walled product 11 caused by improper temperature during the injection molding process, and improving the product quality and production efficiency.

[0028] The temperature adjustment mechanism 4 includes a temperature control component 41. The temperature control component 41 includes a heating air pump 411 and a cooling air pump 413 arranged in the fixed mold bottom plate 21. The air outlet end of the heating air pump 411 is communicated with a first air outlet pipe 412, the air outlet end of the cooling air pump 413 is provided with a second air outlet pipe 414, and an air injection pipe 417 for blowing air into the lower mold base 22 is communicated outside the first air outlet pipe 412 and the second air outlet pipe 414. The heating air pump 411 and the cooling air pump 413 of the temperature control component 41 can respectively provide hot air and cold air, and the temperature of the lower mold base 22 is adjusted through the air injection pipe 417 to ensure the stability of the injection molding environment.

[0029] The temperature adjustment mechanism 4 further includes an adjustment component 42 for adjusting the position of the air injection pipe 417. The adjustment component 42 includes a first mounting bracket 421 provided in the fixed mold bottom plate 21. A slider 422 is movably provided in the first mounting bracket 421. A positioning frame 423 is movably provided outside the slider 422. The air injection pipe 417 is provided inside the positioning frame 423.

[0030] Furthermore, the adjustment component 42 includes a connecting gear 424 movably provided on the side of the positioning frame 423 away from the slider 422. A second mounting bracket 425 is also provided in the fixed mold bottom plate 21. A rack plate 426 that can mesh with the connecting gear 424 is fixed outside the second mounting bracket 425. The meshing design of the connecting gear 424 and the rack plate 426 enables the positioning frame 423 to rotate precisely, thereby adjusting the blowing direction of the air injection pipe 417 and ensuring the uniformity and accuracy of temperature adjustment.

[0031] Furthermore, the adjustment component 42 further includes a mounting seat 427 provided at the bottom end of the first mounting bracket 421. A first motor 428 is provided in the mounting seat 427. A threaded rod 429 is drivingly connected to the output shaft of the first motor 428. The threaded rod 429 is in threaded connection with the slider 422. The first motor 428 drives the threaded rod 429 to rotate, driving the slider 422 to move along the threaded rod 429, realizing the lifting adjustment of the positioning frame 423, so that the air injection pipe 417 can flexibly adjust its position as needed.

[0032] Furthermore, two groups of limiting rods 4210 are provided in the first mounting bracket 421. The two groups of limiting rods 4210 are symmetrically arranged on the side of the threaded rod 429, and through holes for the limiting rods 4210 to penetrate are provided in the slider 422. The design of the limiting rods 4210 ensures the stability of the slider 422 during movement, prevents it from shifting or rotating, and guarantees the accurate positioning of the positioning frame 423 and the air injection pipe 417.

[0033] Furthermore, the temperature control component 41 further includes a control valve 415 provided outside the first air outlet pipe 412 for controlling the opening and closing of the first air outlet pipe 412. The first air outlet pipe 412 is communicated with the second air outlet pipe 414. The setting of the control valve 415 can flexibly control the opening and closing of the first air outlet pipe 412, thereby adjusting the hot air flow provided by the heating air pump 411 and realizing the precise control of the temperature of the lower mold base 22.

[0034] Furthermore, a telescopic pipe 416 is communicated outside the second air outlet pipe 414, and the air injection pipe 417 is provided on the side of the telescopic pipe 416 away from the second air outlet pipe 414. The design of the telescopic pipe 416 enables the air injection pipe 417 to ensure that the blowing effect covers the lower mold base 22 and improves the uniformity of temperature adjustment.

[0035] Embodiment 2: Please refer to Figure 7, and in combination with Embodiment 1, it is further obtained that an auxiliary positioning component 5 for positioning the tubular thin-walled product 11 is provided in the fixed mold bottom plate 21 to prevent the tubular thin-walled product 11 from being misaligned and deformed during the molding process. The auxiliary positioning component 5 includes a first positioning block 52 and a second positioning block 53 provided in the fixed mold bottom plate 21. A slide rod 55 is slidably provided in the fixed mold bottom plate 21. A return spring 56 is sleeved outside the slide rod 55, and the side of the slide rod 55 close to the second positioning block 53 is connected to the second positioning block 53. The design of the auxiliary positioning component 5 can accurately position the tubular thin-walled product 11 during the injection molding process, prevent it from being misaligned and deformed due to external force or temperature change, and improve the molding quality of the product.

[0036] Furthermore, the auxiliary positioning component 5 further includes a ejector rod 51 provided at the bottom end of the moving template 32, and inclined slots 54 for the ejector rod 51 to be inserted are provided at the top ends of the first positioning block 52 and the second positioning block 53. The matching design of the ejector rod 51 and the inclined slots 54 enables the second positioning block 53 to be automatically pushed to move when the moving template 32 descends and merges with the fixed mold bottom plate 21. After the injection molding is completed, the moving template 32 rises, and the return spring 56 pushes the second positioning block 53 to reset, so as to achieve accurate positioning of the tubular thin-walled product 11 and ensure the reliability of the auxiliary positioning component 5.

[0037] During the actual operation process, when injecting plastic into the tubular thin-walled product 11, a temperature sensor can be added in the lower mold base 22 and signal-connected to relevant display devices to monitor the temperature in the lower mold base 22 and preset the appropriate temperature value for molding. Subsequently, connect the moving mold top plate 31 to the injection molding machine equipment. To ensure the smooth progress of the injection molding process and prevent the tubular thin-walled product 11 from deforming during injection molding, it is necessary to adjust the temperature of the lower mold base 22 to avoid an increase in the injection failure rate caused by too high or too low temperature. The specific operation of temperature adjustment is as follows: If the temperature sensor conveys that the temperature in the lower mold base 22 is higher than the preset temperature value, close the control valve 415 and start the cooling air pump 413. Through the second air outlet pipe 414, send cold air to the air injection pipe 417. At the same time, start the first motor 428 to rotate the threaded rod 429. Under the limitation of the two groups of limiting rods 4210, the slider 422 slides outside the threaded rod 429, driving the positioning frame 423 to slide upward, so that the telescopic pipe 416 extends. When the connecting gear 424 meshes with the rack plate 426, since the position of the rack plate 426 is fixed, the connecting gear 424 rotates, driving the positioning frame 423 to rotate synchronously, making the air injection pipe 417 face the lower mold base 22, thereby changing its temperature. If it is detected that the temperature of the lower mold base 22 is lower than the preset temperature value, then open the heating air pump 411 and the control valve 415, and adjust the temperature of the air flow blown out by the air injection pipe 417 through the first air outlet pipe 412 to preheat the lower mold base 22. After the temperature adjustment is completed, under the action of the first motor 428, make the slider 422 slide in the reverse direction. Under the action of the rack plate 426 and the connecting gear 424, the positioning frame 423 rotates in the reverse direction to retract the air injection pipe 417. Next, operate the injection molding machine to make the moving mold top plate 31 and the moving mold plate 32 fall and merge with the fixed mold bottom plate 21. When merging, the ejector rod 51 contacts the inclined groove 54 in the first positioning block 52 and the second positioning block 53, causing the second positioning block 53 to move outward. After the injection molding is completed, retract the moving mold top plate 31 and the moving mold plate 32. When the ejector rod 51 loses contact with the inclined groove 54, the return spring 56 restores its elasticity, making the second positioning block 53 return to its original position. With the cooperation of the first positioning block 52, position the just-injected tubular thin-walled product 11 to prevent it from being misaligned and deformed. Finally, according to the above operations, make the air injection pipe 417 rise and turn over to blow the surface of the tubular thin-walled product 11 to accelerate its molding, and avoid problems such as too long molding time and unstable molding environment, which may cause the tubular thin-walled product 11 to deform.

[0038] The above embodiments only represent one or several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An anti-deformation injection mold for preparing a tubular thin-walled product, used for injection molding of a tubular thin-walled product (11), comprising a base (1) and a movable mold top plate (31) connected to an injection molding machine, wherein a fixed mold bottom plate (21) is disposed at the top of the base (1), a lower mold seat (22) is disposed in the fixed mold bottom plate (21), and a movable mold plate (32) is disposed at the bottom end of the movable mold top plate (31), characterized in that: A temperature regulating mechanism (4) is provided in the fixed mold base plate (21); the temperature regulating mechanism (4) comprises a temperature control component (41); the temperature control component (41) comprises a heating air pump (411) and a cooling air pump (413) provided in the fixed mold base plate (21); an air outlet end of the heating air pump (411) is connected to a first air outlet pipe (412); an air outlet end of the cooling air pump (413) is provided with a second air outlet pipe (414); the first air outlet pipe (412) and the second air outlet pipe (414) are connected to an external An air jet pipe (417) is provided for blowing air into the lower mold base (22); the temperature regulating mechanism (4) further comprises an adjusting component (42) for adjusting the position of the air jet pipe (417); the adjusting component (42) comprises a first mounting frame (421) arranged in the fixed mold base plate (21); a slider (422) is movably arranged in the first mounting frame (421); a positioning frame (423) is movably arranged outside the slider (422); and the air jet pipe (417) is arranged inside the positioning frame (423).

2. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 1, characterized in that: The adjustment assembly (42) comprises a connecting gear (424) movably arranged on a side of the positioning frame (423) away from the slider (422), and a second mounting frame (425) is also arranged in the fixed mold base plate (21), and a rack plate (426) that can mesh with the connecting gear (424) is fixed outside the second mounting frame (425).

3. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 1, characterized in that: The adjustment assembly (42) further comprises a mounting seat (427) arranged at the bottom end of the first mounting frame (421), a first motor (428) being arranged in the mounting seat (427), a threaded rod (429) being transmission-connected to an output shaft of the first motor (428), and the threaded rod (429) being threadedly connected to the slider (422).

4. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 3, characterized in that: Two groups of limiting rods (4210) are arranged in the first mounting frame (421), and the two groups of limiting rods (4210) are symmetrically arranged beside the threaded rod (429), and the slider (422) is provided with through holes for the limiting rods (4210) to pass through.

5. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 1, characterized in that: The temperature control component (41) further comprises a control valve (415) arranged outside the first air outlet pipe (412) for controlling the opening and closing of the first air outlet pipe (412), wherein the first air outlet pipe (412) is in communication with the second air outlet pipe (414).

6. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 1, characterized in that: The second air outlet pipe (414) is externally connected to a telescopic pipe (416), and the air injection pipe (417) is arranged on a side of the telescopic pipe (416) away from the second air outlet pipe (414).

7. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 1, characterized in that: An auxiliary positioning assembly (5) is arranged in the fixed mold base plate (21), and the auxiliary positioning assembly (5) comprises a first positioning block (52) and a second positioning block (53) arranged in the fixed mold base plate (21). A sliding rod (55) is slidably arranged in the fixed mold base plate (21), a return spring (56) is provided on the outer sleeve of the sliding rod (55), and the sliding rod (55) is connected to the second positioning block (53) at a side close to the second positioning block (53).

8. The anti-deformation injection mold for preparing a tubular thin-walled product according to claim 7, characterized in that: The auxiliary positioning assembly (5) further comprises a push rod (51) arranged at the bottom end of the movable platen (32), and the top ends of the first positioning block (52) and the second positioning block (53) are both provided with an oblique groove (54) for the push rod (51) to be inserted into.

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