Arc-shaped injection mold for processing plastic handrail of treadmill

Abstract

The utility model discloses an arc-shaped injection mold for processing a plastic handrail of a treadmill, which relates to the technical field of injection molds and comprises a male mold in sliding connection with a female mold. The male die and the female die are respectively provided with a water cooling device; according to the utility model, after heat exchange, cooling liquid is gathered from the water inlet to the circulation seat and then enters the cold radiator shell, the water channels and the fins are regularly arranged in the cold radiator shell, so that the contact area between the cooling liquid and air is increased, and meanwhile, the fan accelerates air flow, so that heat in the cooling liquid is dissipated out; an efficient water cooling circulation system is matched with a water channel, fins and a fan in the cold row shell, heat in a mold can be quickly dissipated out, the cooling time of the plastic handrail is shortened, the injection molding period is shortened, and the production efficiency is improved. And the production efficiency is improved.

Description

Technical Field

[0001] This utility model specifically relates to the field of injection mold technology, and more specifically to an arc-shaped injection mold for processing plastic handrails for treadmills. Background Technology

[0002] In today's society, which emphasizes healthy lifestyles, the fitness equipment market continues to expand. Treadmills, with their convenience and efficiency, have become the first choice for many consumers when purchasing fitness equipment. This growing market demand has prompted treadmill manufacturers to continuously optimize product design and pursue a higher quality user experience. As a key component that comes into direct contact with the user, plastic handrails must not only conform to ergonomic design, providing a comfortable and stable grip, but also match modern aesthetics in appearance, showcasing a stylish and refined texture. This places extremely high demands on the processing technology of plastic handrails. Among them, the cooling system of the injection mold, as a core element determining product quality and production efficiency, has made its performance upgrade an inevitable trend in industry development.

[0003] The curved design of treadmill plastic handrails increases the difficulty of cooling. Traditional cooling systems typically use relatively simple water channel layouts, which are difficult to fully conform to the complex curved contours of the handrails. During injection molding, after the molten plastic fills the mold cavity, the heat distribution is uneven, and conventional coolant channels cannot efficiently dissipate heat to areas with concentrated heat. For example, in areas where the curvature of the handrail changes significantly, the coolant flow rate may be slowed down due to the water channel layout, causing the cooling speed in that area to lag behind other areas, creating a cooling speed difference. This uneven cooling causes internal stress in the plastic handrail during the cooling and shrinkage phase, leading to product deformation, warping, surface dents, cracks, and other defects, severely affecting the product's appearance and structural strength, and reducing the yield rate. Utility Model Content

[0004] The purpose of this utility model is to provide an arc-shaped injection mold for processing plastic handrails of treadmills. By installing a water-cooling device with the male and female molds, the production efficiency of the arc-shaped injection mold is improved, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An arc-shaped injection mold for processing plastic handrails for treadmills, comprising:

[0007] A male mold, which is slidably connected to a female mold; both the male and female molds are equipped with water-cooling devices.

[0008] The male mold includes a lower fixed plate, on which mold feet are symmetrically installed at the front end, and multiple spring pillars are regularly arranged at the front end. The spring pillars are respectively connected to the lower ejector and the upper ejector, and the upper end of the spring pillars is connected to the male mold core.

[0009] The upper ejector is located above the lower ejector, and the upper and lower ends of the upper and lower ejectors are connected to the mold feet; the male mold core is provided with guide pillars at each of its four corners, and the upper and lower ends of the male mold core are symmetrically provided with water channel connectors, and the lower water channel connector is connected to the lower coolant channel.

[0010] As a further technical solution of this utility model, the upper drain connector is connected to the inlet and outlet respectively, and the inlet and outlet are symmetrically arranged at the bottom of the flow seat.

[0011] As a further technical solution of this utility model, the flow seat is fixedly connected to the radiator shell, the radiator shell has regular water channels and fins inside, and a fan is also installed at the upper end of the radiator shell.

[0012] As a further technical solution of this utility model, a fixing plate is installed on the upper end of the male mold core, and a fixing bolt is symmetrically arranged on the fixing plate. The fixing bolt is threadedly connected to the threaded seat, and the threaded seat is symmetrically installed at the front end of the flow seat.

[0013] As a further technical solution of this utility model, the guide post and the guide sleeve are slidably connected. The guide sleeve is located at the four corners of the female mold core. The upper and lower ends of the female mold core are symmetrically provided with upper water passage connectors. The upper water passage connector at the lower end is connected to the upper coolant passage, and the upper water passage connector at the upper end is connected to the water inlet and the water outlet respectively.

[0014] As a further technical solution of this utility model, the front end of the female mold core is connected to the upper fixed plate, a sprue sleeve is installed in the middle position of the upper fixed plate, and an upper fixed plate is installed at the upper end of the upper fixed plate. The upper fixed plate is connected to the connecting plate by two symmetrically arranged fixing bolts, and the upper end of the connecting plate is fixedly connected to the cold radiator shell.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, coolant enters from the outlet at the bottom of the flow seat, flows into the lower coolant channel through the drain connector at the top of the male mold core, and exchanges heat with the male mold core during its flow, absorbing the heat generated by the injection molding process. It then flows out from the drain connector at the top and back into the flow seat through the inlet. The coolant is recycled within the system, avoiding the significant water waste of traditional cooling methods, reducing water costs for enterprises, and meeting the requirements of sustainable development. Furthermore, the cooling water channels in the male and female mold cores are rationally laid out and designed according to the arc shape of the plastic handrail, ensuring more even contact between the cooling water and the mold cavity surface. This guarantees consistent cooling speed across all parts of the plastic handrail, effectively reducing product deformation, internal stress concentration, and other quality problems, and improving the dimensional accuracy and appearance quality of the product. In this invention, after heat exchange, the coolant flows from the inlet to the flow seat, then enters the radiator housing. The regularly arranged water channels and fins inside the radiator housing increase the contact area between the coolant and the air. At the same time, the fan accelerates the airflow, dissipating the heat from the coolant. The coolant is then transported through the outlet to the lower and upper water pipe connectors at the outlet end. This efficient water-cooling circulation system, combined with the water channels, fins, and fan inside the radiator housing, can quickly dissipate the heat from the mold, shortening the cooling time of the plastic handrail, thereby shortening the injection molding cycle and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This utility model Figure 1 Top view.

[0019] Figure 3 This utility model Figure 1 A bottom view.

[0020] Figure 4 This utility model Figure 3 Rear view.

[0021] Figure 5 This utility model Figure 2 A schematic diagram of the split structure.

[0022] Figure 6 This utility model Figure 2 A magnified view of a portion of the image.

[0023] In the diagram: 1-male mold, 2-female mold, 3-water cooling device;

[0024] 11-Lower fixed plate, 12-Mold foot, 13-Spring pillar, 14-Lower ejector, 15-Upper ejector, 16-Mold core, 17-Guide pillar, 18-Fixed plate, 19-Fixed bolt 1, 110-Threaded seat, 111-Lower cooling water channel, 112-Lower water channel connector;

[0025] 21-Upper fixing plate, 22-Gating sleeve, 23-Mounting base, 24-Second fixing bolt, 25-Connecting plate, 26-Female mold core, 27-Guide sleeve, 28-Upper cooling water channel, 29-Upper water channel connector;

[0026] 31-Water inlet, 32-Flow seat, 33-Radiator casing, 34-Water channel, 35-Fins, 36-Fan, 37-Water outlet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 In this embodiment of the utility model, an arc-shaped injection mold for processing plastic handrails of treadmills includes...

[0029] Male mold 1 is slidably connected to female mold 2; water cooling devices 3 are respectively installed on male mold 1 and female mold 2.

[0030] The male mold 1 includes a lower fixed plate 11, on which mold feet 12 are symmetrically installed at the front end and multiple spring pillars 13 are regularly arranged at the front end. The spring pillars 13 are respectively connected to the lower ejector 14 and the upper ejector 15, and the upper end of the spring pillars 13 is connected to the male mold core 16.

[0031] The upper ejector 15 is located at the upper end of the lower ejector 14, and the upper and lower ends of the upper ejector 15 and the lower ejector 14 are connected to the mold base 12; the male mold core 16 is provided with guide pillars 17 at each of its four corners, and the upper and lower ends of the male mold core 16 are symmetrically provided with water channel connectors 112, and the lower water channel connector 112 is connected to the lower cooling water channel 111.

[0032] By adopting the above technical solution, the coolant enters from the outlet 37 at the bottom of the flow seat 32, flows into the lower coolant channel 111 through the drain connector 112 at the upper end of the male mold core 16, and exchanges heat with the male mold core 16 during the flow of the coolant through the lower coolant channel 111, absorbing the heat generated by the male mold core 16 during the injection molding process. Then it flows out from the drain connector 112 at the upper end and flows back to the flow seat 32 through the inlet 37. The coolant is recycled within the system, avoiding the large waste of water resources in traditional cooling methods, reducing the water cost for enterprises, and meeting the requirements of sustainable development.

[0033] In this embodiment, the upper drain connector 112 is connected to the inlet 31 and the outlet 37 respectively, and the inlet 31 and the outlet 37 are symmetrically arranged at the bottom of the flow seat 32.

[0034] The flow seat 32 is fixedly connected to the radiator housing 33. The radiator housing 33 has water channels 34 and fins 35 arranged in a regular pattern inside, and a fan 36 is also installed at the upper end of the radiator housing 33.

[0035] By adopting the above technical solution, cooling water channels are respectively set in the male mold core 16 and the female mold core 26. The layout and design are made in accordance with the arc characteristics of the plastic handrail, so that the cooling water can contact the mold cavity surface more evenly, ensuring that the cooling speed of each part of the plastic handrail is consistent, effectively reducing quality problems such as product deformation and internal stress concentration, and improving the dimensional accuracy and appearance quality of the product.

[0036] In this embodiment, a fixing plate 18 is installed on the upper end of the male mold core 16. Fixing bolts 19 are symmetrically arranged on the fixing plate 18. The fixing bolts 19 are threadedly connected to the threaded seat 110. The threaded seat 110 is symmetrically installed at the front end of the flow seat 32.

[0037] The guide post 17 is slidably connected to the guide sleeve 27. The guide sleeve 27 is located at the four corners of the female mold core 26. The upper and lower ends of the female mold core 26 are symmetrically provided with upper water passage connectors 29. The lower upper water passage connector 29 is connected to the upper cooling water passage 28, and the upper upper water passage connector 29 is connected to the water inlet 31 and the water outlet 37 respectively.

[0038] The front end of the female mold core 26 is connected to the upper fixed plate 21. A sprue sleeve 22 is installed in the middle of the upper fixed plate 21, and an upper fixed plate 21 is installed at the upper end of the upper fixed plate 21. The upper fixed plate 21 is connected to the connecting plate 25 by two symmetrically arranged fixing bolts 24. The upper end of the connecting plate 25 is fixedly connected to the cold radiator shell 33.

[0039] By adopting the above technical solution, after heat exchange, the coolant converges from the inlet 31 to the flow seat 32, and then enters the radiator housing 33. The regularly arranged water channels 34 and fins 35 inside the radiator housing 33 increase the contact area between the coolant and the air. At the same time, the fan 36 accelerates the airflow and dissipates the heat in the coolant. Then, the coolant is transported to the lower water channel connector 112 and the upper water channel connector 29 at the outlet 37 through the outlet 37. The efficient water cooling circulation system, together with the water channels 34, fins 35 and fan 36 inside the radiator housing 33, can quickly dissipate the heat in the mold, shorten the cooling time of the plastic handrail, thereby shortening the injection molding cycle and improving production efficiency.

[0040] The working principle of this utility model is as follows: the coolant enters from the outlet 37 at the bottom of the flow seat 32, flows into the lower coolant channel 111 through the drain connector 112 at the upper end of the male mold core 16, and exchanges heat with the male mold core 16 during the flow of the coolant through the lower coolant channel 111, absorbing the heat generated by the male mold core 16 during the injection molding process. Then it flows out from the drain connector 112 at the upper end and flows back to the flow seat 32 through the inlet 37. The coolant is recycled in the system, avoiding the large waste of water resources in the traditional cooling method, reducing the water cost of enterprises, and meeting the requirements of sustainable development.

[0041] Cooling water channels are provided in the male mold core 16 and female mold core 26 respectively. The layout and design are made in accordance with the arc characteristics of the plastic handrail, so that the cooling water can contact the mold cavity surface more evenly, ensuring that the cooling speed of each part of the plastic handrail is consistent, effectively reducing quality problems such as product deformation and internal stress concentration, and improving the dimensional accuracy and appearance quality of the product.

[0042] After heat exchange, the coolant flows from the inlet 31 to the flow seat 32, and then enters the radiator housing 33. The regularly arranged water channels 34 and fins 35 inside the radiator housing 33 increase the contact area between the coolant and the air. At the same time, the fan 36 accelerates the airflow to dissipate the heat in the coolant. Then, the coolant is transported through the outlet 37 to the lower water channel connector 112 and the upper water channel connector 29 at the outlet 37. The efficient water cooling circulation system, together with the water channels 34, fins 35 and fan 36 inside the radiator housing 33, can quickly dissipate the heat in the mold, shorten the cooling time of the plastic handrail, thereby shortening the injection molding cycle and improving production efficiency.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An arc-shaped injection mold for processing plastic handrails for treadmills, characterized in that: Comprising male die (1) and female die (2) are connected; the male die (1) and female die (2) are respectively provided with water cooling device (3); The lower fixed plate (11) is symmetrically provided with a plurality of spring columns (13) at the front end, and the spring columns (13) are respectively connected with the lower ejection (14) and the upper ejection (15), and the upper end of the spring column (13) is connected with the male die (16); The upper end of the lower ejection (14) is provided with the upper ejection (15), and the upper and lower ends of the upper ejection (15) and the lower ejection (14) are connected with the die foot (12); the male die (16) is provided with guide columns (17) at the four corners, and the upper and lower ends of the male die (16) are symmetrically provided with lower waterway connectors (112), and the lower waterway connectors (112) are connected with the lower cooling liquid path (111).

2. The curved injection mold for processing the plastic handrail of a treadmill according to claim 1, characterized in that: The upper end of the lower waterway connector (112) is connected with the water inlet (31) and the water outlet (37), and the water inlet (31) and the water outlet (37) are symmetrically arranged at the bottom of the flow seat (32).

3. The curved injection mold for processing the plastic handrail of a treadmill according to claim 2, characterized in that: The flow seat (32) is fixedly connected with the cooling row shell (33), and the cooling row shell (33) is regularly provided with water channels (34) and fins (35) inside, and the upper end of the cooling row shell (33) is further provided with a fan (36).

4. The curved injection mold for processing the plastic handrail of a treadmill according to claim 1, wherein: The upper end of the male die (16) is provided with a fixed plate (18), and the fixed plate (18) is symmetrically provided with a fixed bolt (19), and the fixed bolt (19) is threadedly connected with a threaded seat (110), and the threaded seat (110) is symmetrically arranged at the front end of the flow seat (32).

5. The curved injection mold for processing a plastic handrail of a treadmill according to claim 1, wherein: The guide column (17) is slidably connected with the guide sleeve (27), and the guide sleeve (27) is arranged at the four corners of the female die (26), and the upper and lower ends of the female die (26) are symmetrically provided with upper waterway connectors (29), and the upper waterway connectors (29) are connected with the upper cooling liquid path (28), and the upper waterway connectors (29) are respectively connected with the water inlet (31) and the water outlet (37).

6. The curved injection mold for processing the plastic handrail of a treadmill according to claim 5, characterized in that: The front end of the female die (26) is connected with the upper fixed plate (21), the middle position of the upper fixed plate (21) is provided with a gate sleeve (22), and the upper end of the upper fixed plate (21) is provided with an upper fixed plate (21), and the upper fixed plate (21) is connected with the connecting plate (25) through the symmetrically arranged fixed bolt (24), and the upper end of the connecting plate (25) is fixedly connected with the cooling row shell (33).

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