An injection-moulding tool

Abstract

A preform injection mold includes a top plate assembly, which includes a top plate and a sliding plate assembly arranged on the top plate. The sliding plate assembly includes a first sliding plate and a second sliding plate, both extending along a first direction. In a test state, the preform injection mold undergoes multiple opening and closing tests to find an optimal guide path. A corresponding guide rail is then machined on the guide plate using this optimal guide path. In a forming state, the guide plate is mounted on a core plate assembly. As the top plate moves, a sliding component controls the movement of the sliding plate within the guide rail's constraints, thus opening and closing the mold. By employing both test and forming state methods, the preform injection mold achieves rapid acquisition of the optimal guide path, improving mold quality and avoiding repeated design and manufacturing of the guide plate due to mismatch between the guide rail and the mold. This reduces the development cycle and manufacturing cost of the preform injection mold.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and specifically to an injection molding die. Background Technology

[0002] In existing preform injection molds, the opening and closing action of the slide plate is generally achieved through the cooperation of inclined slide plates and rollers (e.g., Figure 1 (As shown). Reference can be made to the sliding plate opening and closing control device and injection mold disclosed in the applicant's previous Chinese utility model patent application, CN202320677969.7, which includes a sliding plate assembly, a pull bar assembly, and a slide groove assembly. The sliding plate assembly is connected to the pull bar assembly, and slide groove assemblies are connected to both ends of the pull bar assembly. The slide groove assembly has a curved track 34 extending from bottom to top outwards from the mold. The pull bar assembly cooperates with the curved track 34 on the slide groove assembly via rollers 23. The sliding plate assembly moves along the curved track 34 via the rollers 23 to achieve the opening and closing action.

[0003] Generally, the curved track (i.e. guide rail) on the inclined slide plate (i.e. guide plate) is fixed. During the testing of the preform mold, some preforms may have difficulty demolding or be unable to be demolded. It is necessary to redesign and process the curved track on the inclined slide plate before testing. In order to ensure the guiding effect of the guide path, a new inclined slide plate is required each time the curved track is processed. It may be necessary to repeat the above steps many times to finally determine the curved track. This process of obtaining the optimal curved track through multiple trials will undoubtedly increase the production cost and time cost significantly. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a preform mold with optimized opening and closing action.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A preform injection mold includes a top plate assembly, the top plate assembly including a top plate and a slide plate assembly disposed on the top plate, the slide plate assembly including a first slide plate and a second slide plate both extending along a first direction;

[0007] When the injection mold is in the test state, a test component is connected to the top plate. When the top plate slides along the third direction, the first slide plate and the second slide plate slide in opposite directions or towards each other under the action of the test component to perform mold opening and closing tests.

[0008] When the injection mold is in the forming state, the injection mold also includes a guiding mechanism. The guiding path of the guiding mechanism is generated according to the test results of the mold opening and closing test. When the top plate slides along the third direction, the first slide plate and the second slide plate slide in opposite directions or towards each other in the second direction under the action of the guiding mechanism to open and close the mold.

[0009] Furthermore, multiple sets of sliding plate groups are arranged back and forth along the second direction on the top plate. Among the multiple sets of sliding plate groups, multiple first sliding plates are linked together, and multiple second sliding plates are linked together.

[0010] Furthermore, the guiding mechanism includes a first rolling element, a second rolling element, and opposing first and second guide rails, the guiding paths of the first and second guide rails being generated based on the test results of the mold opening and closing test;

[0011] The first rolling element and the second rolling element are respectively connected to the first sliding plate and the second sliding plate, and respectively roll in cooperation with the first guide rail and the second guide rail;

[0012] When the top plate slides along a third direction, the first rolling element rolls along the first guide rail, and the second rolling element rolls along the second guide rail, thereby causing the first sliding plate and the second sliding plate to slide in opposite directions or towards each other in the second direction to open and close the mold.

[0013] Furthermore, the guiding mechanism includes a first rolling element, a second rolling element, and opposing first and second guide rails, the guiding paths of the first and second guide rails being generated based on the test results of the mold opening and closing test;

[0014] The top plate is slidably provided with a first sliding bar and a second sliding bar along the second direction, and a plurality of first sliding plates are respectively connected to the first sliding bar, and a plurality of second sliding plates are respectively connected to the second sliding bar to achieve linkage;

[0015] The first rolling element and the second rolling element are directly or indirectly connected to the first sliding bar and the second sliding bar, respectively, and are in rolling cooperation with the first guide rail and the second guide rail, respectively;

[0016] When the top plate slides along a third direction, the first rolling element rolls along the first guide rail, and the second rolling element rolls along the second guide rail, thereby causing the first sliding bar and the second sliding bar to slide along the second direction and in opposite directions, so that the first sliding plate and the second sliding plate slide in opposite directions or towards each other in the second direction to open and close the mold.

[0017] Furthermore, the injection mold also includes a core plate assembly, which includes a core plate and a guide plate, and the top plate slides on the core plate along a third direction;

[0018] The first guide rail and the second guide rail are disposed on the same guide plate, or the first guide rail and the second guide rail are disposed on two separate guide plates, and the guide plates are disposed on the mold core plate.

[0019] Furthermore, the injection mold also includes a position sensor, with a first sensing element disposed on the side of the mold core plate and a second sensing element disposed on the side of the top plate.

[0020] Furthermore, the test assembly includes two test devices mirror-mounted on the front and rear sides of the top plate along the second direction. Each test device includes a drive mechanism, a slide plate, and a connecting block. The drive mechanism is fixed to the front or rear side of the top plate. The drive end of the drive mechanism is connected to the slide plate. The slide plate is provided with a slide groove. The connecting block is connected to a sliding component that cooperates with the slide groove. The connecting block is connected to the first slide of the foremost slide plate group or the second slide of the rearmost slide plate group.

[0021] When the top plate slides along a third direction, the driving mechanism drives the slide plate to move along a first direction. Based on the cooperation between the slide and the sliding member, the first slide plate and the second slide plate slide in opposite directions or towards each other along a second direction to perform mold opening and closing tests.

[0022] Furthermore, the injection mold also includes a limit trigger assembly, which includes an upper limit trigger and a lower limit trigger.

[0023] The first contact of the upper limit trigger is located on the upper side of the slide plate, and the second contact of the upper limit trigger is located on the upper left / upper right side of the top plate.

[0024] The first contact of the lower limit trigger is located on the lower side of the slide plate, and the second contact of the lower limit trigger is located on the lower left / lower right side of the top plate.

[0025] Furthermore, the driving mechanism is a linear motor mechanism, which includes a guide rail and a linear motor. The guide rail is arranged along a first direction, the linear motor is slidably disposed on the guide rail, and the slide plate is disposed on the linear motor.

[0026] Furthermore, the driving mechanism is a servo motor mechanism, which includes a servo motor and a screw-slider module. The screw of the screw-slider module is arranged along a first direction and connected to the rotation drive end of the servo motor. The slide plate is disposed on the slider of the screw-slider module.

[0027] Alternatively, the servo motor mechanism includes a servo motor and a gear and rack assembly, wherein the rack of the gear and rack assembly is arranged along a first direction, the gears of the gear and rack assembly mesh with the rack of the gear and rack assembly and are connected to the rotation drive end of the servo motor, and the slide plate is disposed on the rack of the gear and rack assembly.

[0028] The present invention has the following advantages and beneficial effects:

[0029] In the testing state, the injection mold undergoes multiple mold opening and closing tests to find the optimal guide path. The corresponding guide rail is then machined on the guide plate according to the optimal guide path. In the forming state, the guide plate is installed on the mold core plate assembly. When the top plate moves, the sliding component controls the movement of the slide plate under the constraint of the guide rail to open and close the mold. Through the solutions in the testing and forming states, the injection mold achieves rapid acquisition of the optimal guide path, improves the quality of the injection mold, avoids repeated design and manufacturing of the guide plate due to the mismatch between the guide rail and the injection mold, and reduces the development cycle and manufacturing cost of the injection mold. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] Figure 1 This is a schematic diagram of the fit between the inclined slide plate and the bearing in the background art;

[0032] Figure 2 This is a schematic diagram of the injection mold in the test state in this embodiment;

[0033] Figure 3 This is a schematic diagram of the mold opening and closing test of the injection mold in this embodiment;

[0034] Figure 4 This is a schematic diagram of the top plate assembly in the molding state in this embodiment;

[0035] Figure 5 This is a schematic diagram of the injection mold in the forming state in this embodiment. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments.

[0037] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] like Figures 2 to 5 As shown, this embodiment discloses a billet injection mold, which includes a top plate assembly 2, the top plate assembly 2 including a top plate 21 and a slide plate assembly 22 arranged on the top plate 21, the slide plate assembly 22 including a first slide plate 221 and a second slide plate 222 both extending along a first direction;

[0040] When the injection mold is in the test state, the test component 3 is connected to the top plate 21. When the top plate 21 slides along the third direction, the first slide plate 221 and the second slide plate 222 slide in opposite directions or towards each other in the second direction under the action of the test component 3 to perform the mold opening and closing test.

[0041] When the injection mold is in the forming state, the injection mold also includes a guide mechanism 4. The guide path of the guide mechanism 4 is generated according to the test results of the mold opening and closing test. When the top plate 21 slides along the third direction, the first slide plate 221 and the second slide plate 222 slide in opposite directions or towards each other in the second direction under the action of the guide mechanism 4 to open and close the mold.

[0042] It should be noted that the selection of the optimal mold opening and closing guide path is mainly determined based on factors such as the quality of the product injection molded by the preform mold and the molding cycle. Those skilled in the art can determine the optimal injection molding scheme based on these factors, and then obtain the mold opening and closing guide path corresponding to the injection molding scheme.

[0043] In this invention, multiple sets of sliding plate groups 22 are arranged on the top plate 21 along the second direction. Among the multiple sets of sliding plate groups 22, multiple first sliding plate groups 221 are linked together, and multiple second sliding plate groups 222 are linked together.

[0044] Furthermore, the test assembly 3 includes two test devices mirror-mounted on the front and rear sides of the top plate 21 along the second direction. Each test device includes a drive mechanism 31, a slide plate 32, and a connecting block 33. The drive mechanism 31 is fixed to the front or rear side of the top plate 21. The drive end of the drive mechanism 31 is connected to the slide plate 32. The slide plate 32 is provided with a slide groove 321. The connecting block 33 is connected to a sliding member 331 that cooperates with the slide groove 321. The connecting block 33 is connected to the first slide plate 221 of the foremost slide plate group 22 or the second slide plate 222 of the rearmost slide plate group 22.

[0045] When the top plate 21 slides along a third direction, the driving mechanism 31 drives the slide plate 32 to move along a first direction. Based on the cooperation between the slide 321 and the sliding member 331, the first slide plate 221 and the second slide plate 222 slide in opposite directions or towards each other along a second direction to perform mold opening and closing tests.

[0046] Furthermore, the injection mold also includes a limit trigger assembly 5, which includes an upper limit trigger 51 and a lower limit trigger 52. The first contact of the upper limit trigger 51 is located on the upper side of the slide plate 32, and the second contact of the upper limit trigger 51 is located on the upper left / upper right side of the top plate 21. The first contact of the lower limit trigger 52 is located on the lower side of the slide plate 32, and the second contact of the lower limit trigger 52 is located on the lower left / lower right side of the top plate 21.

[0047] In this invention, the guiding mechanism 4 includes a first rolling element 41, a second rolling element 42, and opposing first guide rails 43 and second guide rails 44. The guiding paths of the first guide rails 43 and the second guide rails 44 are generated based on the test results of the mold opening and closing test. The first rolling element 41 and the second rolling element 42 are respectively connected to the first sliding plate 221 and the second sliding plate 222, and respectively roll in cooperation with the first guide rails 43 and the second guide rails 44. When the top plate 21 slides along a third direction, the first rolling element 41 rolls along the first guide rail 43, and the second rolling element 42 rolls along the second guide rail 44, thereby causing the first sliding plate 221 and the second sliding plate 222 to slide in opposite directions or towards each other in a second direction to perform mold opening and closing.

[0048] In this invention, the guiding mechanism 4 includes a first rolling element 41, a second rolling element 42, and opposing first guide rails 43 and second guide rails 44. The guiding paths of the first guide rails 43 and the second guide rails 44 are generated based on the test results of the mold opening and closing test. A first sliding strip 211 and a second sliding strip 212 are slidably disposed on the top plate 21 along a second direction. Multiple first sliding plates 221 are respectively connected to the first sliding strips 211, and multiple second sliding plates 222 are respectively connected to the second sliding strips 212 to achieve linkage. The first rolling element 41 and the... The second rolling element 42 is connected to the first sliding bar 211 and the second sliding bar 212 respectively, and rolls in cooperation with the first guide rail 43 and the second guide rail 44 respectively. When the top plate 21 slides along the third direction, the first rolling element 41 rolls along the first guide rail 43 and the second rolling element 42 rolls along the second guide rail 44, so that the first sliding bar 211 and the second sliding bar 212 slide along the second direction and in opposite directions, so that the first sliding plate 221 and the second sliding plate 222 slide in opposite directions or towards each other along the second direction to open and close the mold.

[0049] In this invention, the injection mold further includes a core plate assembly 1, which includes a core plate 11 and a guide plate 12. The top plate 21 slides along a third direction on the core plate 11. The first guide rail 43 and the second guide rail 44 are disposed on the same guide plate 12, or the first guide rail 43 and the second guide rail 44 are respectively disposed on two guide plates 12, and the guide plates 12 are all disposed on the core plate 11.

[0050] Furthermore, the injection mold also includes a position sensor 6, with a first sensing element 61 disposed on the side of the mold core plate 11 and a second sensing element 62 disposed on the side of the top plate 21.

[0051] In this invention, the first direction and the second direction are perpendicular to each other. The direction in which the skateboard extends is the first direction, the direction in which the skateboard assembly is arranged on the top plate is the second direction, and the third direction is a direction that is perpendicular to both the first direction and the second direction.

[0052] The above description in this specification is merely illustrative of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the content of this specification or exceed the scope defined in the claims, they should all fall within the protection scope of this invention.

Claims

1. A preform injection mold, the preform injection mold comprising a top plate assembly, the top plate assembly comprising a top plate and a slide plate assembly disposed on the top plate, the slide plate assembly comprising a first slide plate and a second slide plate both extending along a first direction; characterized in that: When the injection mold is in the test state, a test component is connected to the top plate. When the top plate slides along the third direction, the first slide plate and the second slide plate slide in opposite directions or towards each other under the action of the test component to perform mold opening and closing tests. When the injection mold is in the forming state, the injection mold also includes a guiding mechanism. The guiding path of the guiding mechanism is generated according to the test results of the mold opening and closing test. When the top plate slides along the third direction, the first slide plate and the second slide plate slide in opposite directions or towards each other under the action of the guiding mechanism to open and close the mold. Multiple sets of sliding plates are arranged back and forth along the second direction on the top plate. Among the multiple sets of sliding plates, multiple first sliding plates are linked together, and multiple second sliding plates are linked together. The test assembly includes two test devices mirror-mounted on the front and rear sides of the top plate along the second direction. Each test device includes a drive mechanism, a slide plate, and a connecting block. The drive mechanism is fixed to the front or rear side of the top plate. The drive end of the drive mechanism is connected to the slide plate. The slide plate is provided with a slide groove. The connecting block is connected to a sliding component that cooperates with the slide groove. The connecting block is connected to the first slide of the foremost slide plate group or the second slide of the rearmost slide plate group. When the top plate slides along a third direction, the driving mechanism drives the slide plate to move along a first direction. Based on the cooperation between the slide and the sliding member, the first slide plate and the second slide plate slide in opposite directions or towards each other along a second direction to perform mold opening and closing tests. The injection mold also includes a limit trigger assembly, which includes an upper limit trigger and a lower limit trigger. The first contact of the upper limit trigger is located on the upper side of the slide plate, and the second contact of the upper limit trigger is located on the upper left / upper right side of the top plate. The first contact of the lower limit trigger is located on the lower side of the slide plate, and the second contact of the lower limit trigger is located on the lower left / lower right side of the top plate.

2. The injection mold according to claim 1, characterized in that, The guiding mechanism includes a first rolling element, a second rolling element, and opposing first and second guide rails, the guiding paths of the first and second guide rails being generated based on the test results of the mold opening and closing test; The first rolling element and the second rolling element are respectively connected to the first sliding plate and the second sliding plate, and respectively roll in cooperation with the first guide rail and the second guide rail; When the top plate slides along a third direction, the first rolling element rolls along the first guide rail, and the second rolling element rolls along the second guide rail, thereby causing the first sliding plate and the second sliding plate to slide in opposite directions or towards each other in the second direction to open and close the mold.

3. The injection mold according to claim 1, characterized in that, The guiding mechanism includes a first rolling element, a second rolling element, and opposing first and second guide rails, the guiding paths of the first and second guide rails being generated based on the test results of the mold opening and closing test; The top plate is slidably provided with a first sliding bar and a second sliding bar along the second direction, and a plurality of first sliding plates are respectively connected to the first sliding bar, and a plurality of second sliding plates are respectively connected to the second sliding bar to achieve linkage; The first rolling element and the second rolling element are directly or indirectly connected to the first sliding bar and the second sliding bar, respectively, and are in rolling cooperation with the first guide rail and the second guide rail, respectively; When the top plate slides along a third direction, the first rolling element rolls along the first guide rail, and the second rolling element rolls along the second guide rail, thereby causing the first sliding bar and the second sliding bar to slide along the second direction and in opposite directions, so that the first sliding plate and the second sliding plate slide in opposite directions or towards each other in the second direction to open and close the mold.

4. The injection mold according to claim 2 or 3, characterized in that, The injection mold also includes a core plate assembly, which includes a core plate and a guide plate, and the top plate slides on the core plate along a third direction. The first guide rail and the second guide rail are disposed on the same guide plate, or the first guide rail and the second guide rail are disposed on two separate guide plates, and the guide plates are disposed on the mold core plate.

5. The injection mold according to claim 4, characterized in that, The injection mold also includes a position sensor, with a first sensing element disposed on the side of the mold core plate and a second sensing element disposed on the side of the top plate.

6. The injection mold according to claim 1, characterized in that, The driving mechanism is a linear motor mechanism, which includes a guide rail and a linear motor. The guide rail is arranged along a first direction, the linear motor is slidably mounted on the guide rail, and the slide plate is mounted on the linear motor.

7. The injection mold according to claim 1, characterized in that, The driving mechanism is a servo motor mechanism, which includes a servo motor and a screw-slider module. The screw of the screw-slider module is arranged along a first direction and connected to the rotation drive end of the servo motor. The slide plate is disposed on the slider of the screw-slider module. Alternatively, the servo motor mechanism includes a servo motor and a gear and rack assembly, wherein the rack of the gear and rack assembly is arranged along a first direction, the gears of the gear and rack assembly mesh with the rack of the gear and rack assembly and are connected to the rotation drive end of the servo motor, and the slide plate is disposed on the rack of the gear and rack assembly.

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