Injection mold and injection method for an advertising machine housing

Abstract

The application provides an injection mold for an advertising machine shell and an injection method thereof. The injection mold comprises a base, a stand column is mounted on the side of the base, a telescopic spring is sleeved on the stand column, one end of the telescopic spring away from the base is in abutment with a sliding plate sleeved on the stand column, a receiving piece is arranged on the base, a cavity is formed in the receiving piece, a connecting plate is fixed at one end of the stand column away from the base, a cylinder is mounted on the connecting plate, a piston rod on the cylinder is fixedly connected with the sliding plate, an abutment piece is arranged on the sliding plate, and the abutment piece comprises a shell, a distance sensor, a mold base, a sliding block, an expansion pipe and a moving rod. The expansion pipe expands or shrinks due to the change of the gas in the expansion pipe caused by the change of temperature, and then synchronously drives the moving rod to move in the vertical direction, so that the change amount of the moving distance of the moving rod is monitored, and the optimal cooling time can be determined.

Description

Technical Field

[0001] This invention relates to the field of casing injection molding, and particularly to an injection mold for an advertising machine casing and its injection molding method. Background Technology

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. The casings of most advertising machines are made primarily of PC plastic. During production, the plastic is injected into a mold cavity, and after cooling and solidification, the molded product is obtained.

[0003] When using molds, cooling and fixing are required after injection molding, and the material can only be removed after it has completely solidified. However, existing advertising machine casings suffer from poor cooling during the injection molding process, resulting in long cooling times and low production efficiency. Summary of the Invention

[0004] In view of this, the main objective of this invention is to solve the technical problem of poor cooling effect and long cooling time in the injection molding process of existing advertising machine shells, which leads to low production efficiency.

[0005] This invention provides an injection mold for the casing of an advertising machine, comprising:

[0006] A base, on the side of which a column is installed, and a telescopic spring is fitted on the column. The end of the telescopic spring away from the base abuts against a sliding plate fitted on the column.

[0007] A receiving component is provided on the base, and the receiving component has a cavity.

[0008] A connecting plate is fixed to the end of the column away from the base, and a cylinder is installed on the connecting plate. The piston rod on the cylinder is fixedly connected to the sliding plate.

[0009] An abutment component disposed on the slide plate includes a housing, a distance sensor, a mold base, a sliding block, an expansion tube, and a moving rod;

[0010] The distance sensor is mounted on the housing and is on the same vertical axis as the moving rod. The mold base is mounted in the housing. One end of the expansion tube inside the mold base abuts against the sliding block. The moving rod is fixed on the sliding block. The expansion tube expands or contracts due to temperature changes in the gas inside the expansion tube, thereby synchronously driving the moving rod to move in the vertical direction.

[0011] In some embodiments of the present invention, the abutting member further includes a limiting plate disposed at the bottom of the housing, the limiting plate being mounted on the housing by screws, and the limiting plate abutting against the mold base.

[0012] In some embodiments of the present invention, the receiving member is further provided with a positioning groove, which is inserted into and engaged with a positioning block on the housing.

[0013] In some embodiments of the present invention, the distance sensor is mounted on the housing via a mounting bracket.

[0014] In some embodiments of the present invention, a cooling assembly is provided inside the receiving component. The cooling assembly includes a circulating pump, a cooling tank, and a water cooler that are connected in sequence through a connecting pipe. Both ends of the water cooling pipe are connected to the connecting pipe, and the water cooling pipe is located directly below the cavity.

[0015] The present invention also provides an injection molding method for an advertising machine housing, the injection molding method comprising:

[0016] When the mold base is inserted into the cavity, the displacement of the moving rod in the first preset time period is obtained according to the distance sensor to obtain the first displacement sequence. The first displacement sequence includes the displacement of the moving rod at different times in the first preset time period.

[0017] Determine whether the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold.

[0018] If the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold, then the last displacement in the two adjacent displacements sorted by time is defined as an abnormal displacement, and the next displacement in the displacement sequence is obtained. The next displacement is the displacement adjacent to the abnormal displacement in sorted by time.

[0019] Determine whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold.

[0020] If the change between the next displacement and the abnormal displacement is greater than the second preset threshold, then it is determined whether the next displacement is less than the third preset threshold.

[0021] If the next displacement is not less than the third preset threshold, the cylinder is controlled to stop working at the moment corresponding to the next displacement, and the displacement of the moving rod in the second preset time period is obtained to obtain the second displacement sequence. The second displacement sequence contains the displacement of the moving rod at different moments in the second preset time period.

[0022] Determine whether a certain displacement in the second displacement sequence is less than a third preset threshold;

[0023] If the value is less than the threshold, the circulating pump will start working until the change in the value of two adjacent displacements in the second displacement sequence is not greater than the first preset threshold, at which point the circulating pump will stop working.

[0024] In some embodiments of the present invention, after determining whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold, the method further includes:

[0025] If the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then continue to determine whether the change in two other adjacent displacements in the first displacement sequence is greater than the first preset threshold, until the change in two adjacent displacements in the first displacement sequence is greater than the first preset threshold.

[0026] In some embodiments of the present invention, after determining whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold, the method further includes:

[0027] If the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then it is determined that the change in the other two adjacent displacements in the first displacement sequence is greater than the first preset threshold, wherein the other two displacements include the next displacement.

[0028] In some embodiments of the present invention, after determining whether a certain displacement in the second displacement sequence is less than a third preset threshold, the method further includes:

[0029] Continue to determine whether other displacements in the second displacement sequence are less than the third preset threshold.

[0030] This invention provides an injection mold for an advertising machine casing and its injection method. A distance sensor is installed on the casing, and the distance sensor and the moving rod are on the same vertical axis. The mold base is installed in the casing, and one end of the expansion tube inside the mold base abuts against a sliding block. The moving rod is fixed on the sliding block. The expansion tube expands or contracts due to temperature changes in the gas inside the expansion tube, which in turn drives the moving rod to move vertically. By monitoring the change in the moving distance of the moving rod, the optimal cooling time can be determined. Attached Figure Description

[0031] Figure 1 This is an assembly diagram of an injection mold for an advertising machine casing according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the abutment component of an injection mold for an advertising machine casing according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of a support component for an injection mold of an advertising machine casing according to an embodiment of the present invention;

[0034] Figure 4This is a flowchart of an injection molding method for an advertising machine casing provided in an embodiment of the present invention.

[0035] The above figures include the following reference numerals:

[0036] 10. Base; 11. Column; 12. Telescopic spring; 13. Connecting plate; 14. Cylinder; 15. Piston rod; 16. Slide plate; 20. Receiving part; 21. Positioning groove; 22. Cavity; 23. Cooling box; 24. Circulating pump; 25. Water cooler; 26. Water cooling pipe; 27. Connecting pipe; 31. Housing; 32. Mounting base; 33. Distance sensor; 34. Limiting plate; 35. Mold base; 36. Sliding block; 37. Expansion tube; 38. Moving rod. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Please see Figures 1-3 The illustration shows an injection mold for an advertising machine casing, comprising: a base 10, a column 11 mounted on the side of the base 10, a telescopic spring 12 sleeved on the column 11, the end of the telescopic spring 12 away from the base 10 abutting against a sliding plate 16 sleeved on the column 11; a receiving member 20 disposed on the base 10, the receiving member 20 having a cavity 22; a connecting plate 13 fixed to the end of the column 11 away from the base 10, a cylinder 14 mounted on the connecting plate 13, the piston rod 15 of the cylinder 14 being fixedly connected to the sliding plate 16; and a mounting plate 13 on the sliding plate 16. The abutment component includes a housing 31, a distance sensor 33, a mold base 35, a sliding block 36, an expansion tube 37, and a moving rod 38. The distance sensor 33 is disposed on the housing 31, and the distance sensor 33 and the moving rod 38 are on the same vertical axis. The mold base 35 is disposed in the housing 31. One end of the expansion tube 37 in the mold base 35 abuts against the sliding block 36. The moving rod 38 is fixed on the sliding block 36. The expansion tube 37 expands or contracts due to temperature changes in the gas inside it, thereby synchronously driving the moving rod 38 to move in the vertical direction.

[0039] Applying the technical solution of this embodiment, when the mold base 35 is inserted into the cavity 22, the temperature of the part to be injected is relatively high, which will cause the gas temperature in the expansion tube 37 to rise, thereby causing the expansion tube 37 to expand. During the expansion process, the moving rod 38 will move in the vertical direction toward the distance sensor 33. Thus, the optimal cooling start time and cooling end time can be determined based on the change in the moving distance of the moving rod 38.

[0040] It should be noted that a cooling assembly is provided inside the receiving component 20. The cooling assembly includes a circulating pump 24, a cooling tank 23 and a water cooler 25 connected in sequence through a connecting pipe 27. Both ends of the water cooling pipe 26 are connected to the connecting pipe 27, and the water cooling pipe 26 is located directly below the cavity 22.

[0041] Specifically, the abutting member also includes a limiting plate 34 at the bottom of the housing 31. The limiting plate 34 is installed on the housing 31 by screws and abuts against the mold base 35.

[0042] Furthermore, the receiving component 20 is also provided with a positioning groove 21, which is engaged with the positioning block on the housing 31.

[0043] Furthermore, the distance sensor 33 is mounted on the housing 31 via a mounting base 32.

[0044] In this embodiment, the distance sensor 33, the cylinder 14, and the circulating pump 24 are all connected to the microcontroller.

[0045] Please see Figure 4 This application illustrates an injection molding method for an advertising machine housing, the injection molding method comprising:

[0046] Step S101: When the mold base 35 is inserted into the cavity 22, the displacement of the moving rod 38 in the first preset time period is obtained according to the distance sensor 33, and a first displacement sequence is obtained. The first displacement sequence includes the displacement of the moving rod 38 at different times in the first preset time period.

[0047] Step S102: Determine whether the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold.

[0048] Step S103: If the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold, then the last displacement in the two adjacent displacements sorted by time is defined as an abnormal displacement, and the next displacement in the displacement sequence is obtained. The next displacement is the displacement adjacent to the abnormal displacement in the time sort.

[0049] In this step, if the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then it continues to determine whether the change in two other adjacent displacements in the first displacement sequence is greater than the first preset threshold, until the change in two adjacent displacements in the first displacement sequence is greater than the first preset threshold.

[0050] Step S104: Determine whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold.

[0051] In this step, if the change in two adjacent displacements in the first displacement sequence is greater than the first preset threshold, it may be due to excessive temperature change causing gas expansion and thus causing the moving rod 38 to shift, or it may be due to vibration generated during the extrusion of the injection molded part. Therefore, it is determined whether the change between the next displacement and the abnormal displacement is greater than the second preset threshold. This can effectively determine whether the shift of the moving rod 38 is caused by excessive temperature change causing gas expansion. If the change between the next displacement and the abnormal displacement is greater than the second preset threshold, it indicates that the displacement of the moving rod 38 is continuously increasing, and thus the shift of the moving rod 38 is caused by excessive temperature change causing gas expansion.

[0052] It should be noted that if the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then it is determined that the change in the other two adjacent displacements in the first displacement sequence is greater than the first preset threshold, wherein the other two displacements include the next displacement.

[0053] Step S105: If the change between the next displacement and the abnormal displacement is greater than the second preset threshold, then determine whether the next displacement is less than the third preset threshold.

[0054] Step S106: If the next displacement is not less than the third preset threshold, then control the cylinder 14 to stop working at the moment corresponding to the next displacement, and obtain the displacement of the moving rod 38 in the second preset time period to obtain the second displacement sequence. The second displacement sequence includes the displacement of the moving rod 38 at different moments in the second preset time period.

[0055] In this step, if the next displacement is not less than the third preset threshold, it means that the moving rod 38 has reached the maximum displacement. Therefore, the cylinder 14 is controlled to stop working at the moment corresponding to the next displacement, so that the cylinder 14 continuously applies a stable force to the mold base 35.

[0056] Step S107: Determine whether a certain displacement in the second displacement sequence is less than a third preset threshold.

[0057] In one specific embodiment, if a certain displacement in the second displacement sequence is not less than a third preset threshold, then it is further determined whether other displacements in the second displacement sequence are less than the third preset threshold.

[0058] Step S108: If the value is less than the threshold, control the circulation pump 24 to start working until the change in the value of two adjacent displacements in the second displacement sequence is not greater than the first preset threshold, then control the circulation pump 24 to stop working.

[0059] In this step, if a certain displacement in the second displacement sequence is less than the third preset threshold, it indicates that the temperature of the part to be injected is decreasing and can begin to solidify. This controls the circulation pump 24 to start working, enabling faster solidification of the part to be injected. The circulation pump 24 stops working when the change between two adjacent displacements in the second displacement sequence is no greater than the first preset threshold, indicating that the temperature of the part to be injected has stabilized. This completes the entire injection molding process of the advertising machine casing.

[0060] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An injection mold for the casing of an advertising machine, characterized in that, include: A base (10) is provided with a column (11) installed on the side of the base (10). A telescopic spring (12) is sleeved on the column (11). The end of the telescopic spring (12) away from the base (10) abuts against a sliding plate (16) sleeved on the column (11). The receiving part (20) is provided on the base (10). The receiving part (20) has a cavity (22). A cooling assembly is provided inside the receiving part (20). The cooling assembly includes a circulating pump (24), a cooling box (23) and a water cooler (25) connected in sequence through a connecting pipe (27). The two ends of the water cooling pipe (26) are respectively connected to the connecting pipe (27), and the water cooling pipe (26) is located directly below the cavity (22). A connecting plate (13) is fixed to one end of the column (11) away from the base (10). A cylinder (14) is installed on the connecting plate (13). The piston rod (15) on the cylinder (14) is fixedly connected to the slide plate (16). An abutment is provided on the slide plate (16), the abutment including a housing (31), a distance sensor (33), a mold base (35), a sliding block (36), an expansion tube (37), and a moving rod (38). The distance sensor (33) is mounted on the housing (31), and the distance sensor (33) and the moving rod (38) are on the same vertical axis. The mold base (35) is mounted in the housing (31). One end of the expansion tube (37) in the mold base (35) abuts against the sliding block (36). The moving rod (38) is fixed on the sliding block (36). The gas in the expansion tube (37) is affected by temperature changes, causing the expansion tube (37) to expand or contract, thereby synchronously driving the moving rod (38) to move in the vertical direction.

2. The injection mold for an advertising machine casing according to claim 1, characterized in that, The abutment also includes a limiting plate (34) at the bottom of the housing (31), the limiting plate (34) is installed on the housing (31) by screws, and the limiting plate (34) abuts against the mold base (35).

3. The injection mold for an advertising machine casing according to claim 1, characterized in that, The receiving part (20) is also provided with a positioning groove (21), which is engaged with the positioning block on the housing (31).

4. The injection mold for an advertising machine casing according to claim 1, characterized in that, The distance sensor (33) is mounted on the housing (31) via a mounting base (32).

5. A method for injection molding an advertising machine casing, wherein the injection molding method is used with any one of the injection molds described in claims 1-4, characterized in that, The injection molding method includes: When the mold base (35) is inserted into the cavity (22), the displacement of the moving rod (38) in the first preset time period is obtained according to the distance sensor (33) to obtain the first displacement sequence, which includes the displacement of the moving rod (38) at different times in the first preset time period; Determine whether the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold. If the change in two adjacent displacements in the first displacement sequence is greater than a first preset threshold, then the last displacement in the two adjacent displacements sorted by time is defined as an abnormal displacement, and the next displacement in the displacement sequence is obtained. The next displacement is the displacement adjacent to the abnormal displacement in sorted by time. Determine whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold. If the change between the next displacement and the abnormal displacement is greater than the second preset threshold, then it is determined whether the next displacement is less than the third preset threshold. If the next displacement is not less than the third preset threshold, the cylinder (14) is controlled to stop working at the moment corresponding to the next displacement, and the displacement of the moving rod (38) in the second preset time period is obtained to obtain the second displacement sequence. The second displacement sequence contains the displacement of the moving rod (38) at different moments in the second preset time period. Determine whether a certain displacement in the second displacement sequence is less than a third preset threshold; If the value is less than the threshold, the circulating pump (24) is controlled to start working until the change in the two adjacent displacement values ​​in the second displacement sequence is not greater than the first preset threshold, at which point the circulating pump (24) is controlled to stop working.

6. The injection molding method for an advertising machine casing according to claim 5, characterized in that, After determining whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold, the method further includes: If the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then continue to determine whether the change in two other adjacent displacements in the first displacement sequence is greater than the first preset threshold, until the change in two adjacent displacements in the first displacement sequence is greater than the first preset threshold.

7. The injection molding method for an advertising machine casing according to claim 5, characterized in that, After determining whether the change between the next displacement and the abnormal displacement is greater than a second preset threshold, the method further includes: If the change in two adjacent displacements in the first displacement sequence is not greater than the first preset threshold, then it is determined that the change in the other two adjacent displacements in the first displacement sequence is greater than the first preset threshold, wherein the other two displacements include the next displacement.

8. The injection molding method for an advertising machine casing according to claim 5, characterized in that, After determining whether a certain displacement in the second displacement sequence is less than a third preset threshold, the method further includes: If a certain displacement in the second displacement sequence is less than the third preset threshold, the system continues to determine whether other displacements in the second displacement sequence are less than the third preset threshold.

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