A low-noise plastic mold

Abstract

The present application relates to the technical field of mold production, in particular to a low-noise plastic mold. The low-noise plastic mold comprises a mold body, which is sequentially provided with a fixed mold base plate, a fixed mold cavity plate and a movable mold cavity plate from top to bottom along the height direction; a connecting rod mechanism, which is formed by at least two connecting rods connected by a first pin shaft, one end of the connecting rod mechanism is rotatably connected to the fixed mold base plate, and the other end is rotatably connected to the fixed mold cavity plate; the fixed mold base plate has an open mold state in which the connecting rods are stretched until collinear, and a closed mold state in which the connecting rods are folded. The low-noise plastic mold provided by the present application eliminates the collision caused by the structure, adopts flexible structure bolted limiting, has no mechanical collision during the opening mold process, and achieves the purpose of greatly reducing the noise of the plastic mold during opening mold; the opening mold structure design is optimized, the noise reduction effect is excellent, the opening mold is silent, the application is flexible, and an excellent working environment is provided; the limiting effect is stable and not easy to loosen, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold production, in particular to a low-noise plastic mold. BACKGROUND

[0002] The plastic mold is a tool matched with the plastic forming machine in the plastic processing industry, which gives the plastic product a complete configuration and accurate size. When injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic product.

[0003] The existing plastic mold opens the mold, the fixed mold base plate on the mold moves upward to separate from the fixed mold cavity plate, drives the fixed distance pull rod on both sides of the fixed mold base plate to move upward, the fixed mold base plate continuously moves until the ball head pull rod and the fixed mold cavity plate are completely separated, the fixed distance pull rod collides with the limiting block located on both sides of the fixed mold cavity plate, thereby generating a large noise; there is direct contact and impact between objects during the opening process, which generates too much noise when impacting, affecting the production environment of the workshop. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defect of large noise when the existing plastic mold is opened, thereby providing a low-noise plastic mold which can effectively reduce the opening noise.

[0005] To solve the above technical problems, the present application provides a low-noise plastic mold, which comprises:

[0006] The mold body is provided with a fixed mold base plate, a fixed mold cavity plate and a movable mold cavity plate in sequence from top to bottom along the height direction.

[0007] The connecting rod mechanism is formed by at least two connecting rods connected in series through a first pin shaft, one end of the connecting rod mechanism is rotatably connected to the fixed mold base plate, and the other end is rotatably connected to the fixed mold cavity plate.

[0008] The fixed mold base plate has an opening state in which the connecting rods are stretched until they are collinear, and a closing state in which the connecting rods are folded.

[0009] Specifically, it further comprises a material rod, one end of which is fixed in the fixed mold base plate, and the other end extends to the gate in the fixed mold cavity plate.

[0010] Specifically, one end of the material rod is formed with a clamping protrusion, and the material rod is embedded and fixed in the fixed mold base plate by the clamping protrusion.

[0011] Specifically, it further comprises a spring pull rod mechanism arranged in the fixed mold base plate and adapted to clamp the clamping protrusion to fix the material rod.

[0012] The spring material rod mechanism comprises a shell and two sets of clamping mechanisms capable of stably clamping the clamping protrusions;

[0013] The clamping mechanisms comprise springs, clamping arms, clamping heads and clamping blocks, and the two sets of clamping mechanisms are symmetrically arranged in the shell cavity.

[0014] One end of each of the clamping blocks is fixed to the surface of the fixed mold cavity plate that is attached to the fixed mold base plate.

[0015] The spring is connected to the end of the clamping arm that is away from the clamping head.

[0016] The middle section of the clamping arm is fixed to the inner wall of the shell by a second pin shaft, and the clamping arm can rotate around the second pin shaft.

[0017] The clamping heads are formed with recesses on the surfaces that are attached to each other.

[0018] The fixed mold base plate is attached to the fixed mold cavity plate, the clamping blocks are embedded in the gap between the clamping head side away from the recess and the shell, the spring is compressed, and the clamping head is closed to clamp the clamping protrusion.

[0019] The fixed mold base plate and the fixed mold cavity plate are separated, the clamping blocks are separated from the shell, the spring is elastically expanded to push the clamping arm to rotate, and the clamping head is separated to release the clamping protrusion.

[0020] Specifically, a plurality of material rods are arranged in parallel and at intervals in the mold body.

[0021] Specifically, the outer wall of the end of the material rod near the clamping protrusion extends horizontally and is connected to form a chuck.

[0022] Specifically, the straight line formed by the connection node of the connecting rod mechanism and the fixed mold base plate and the fixed mold cavity plate is perpendicular to the horizontal plane.

[0023] Specifically, a plurality of connecting rod mechanisms are arranged around the edge of the fixed mold base plate.

[0024] Specifically, a plurality of spring material rod mechanisms are arranged in the fixed mold base plate to clamp the clamping protrusions.

[0025] Specifically, the number of spring material rod mechanisms is the same as the number of material rods.

[0026] The technical scheme of the present application has the following advantages:

[0027] 1. The low-noise plastic mold provided by the present application replaces the structure of limiting position of the distance pull rod and the limiting block in the prior art by setting the connecting rod mechanism which is respectively hinged at the two ends of the fixed mold base plate and the fixed mold cavity plate, eliminates the collision caused by the structure, adopts the flexible structure hinged limiting position, and realizes the purpose of greatly reducing the noise of the plastic mold during mold opening by adopting the flexible structure hinged limiting position and eliminating the mechanical collision during mold opening; the mold opening structure design is optimized, the noise reduction effect is good, the noise during the mold opening process is realized to a certain extent, the application is flexible, the noise generated during the working process of the plastic mold is well controlled, a more beneficial working environment is provided for the physical and mental health of workers; and the limiting effect of the connecting rod mechanism is stable, and is not easy to loosen, improves the production efficiency, improves the service life, improves the stability during the working process, and has high practical value.

[0028] 2. The low-noise plastic mold provided by the present application replaces the design of forcibly removing the material rod by external force in the prior art by setting the spring material rod mechanism which can be opened with the opening of the plastic mold, realizes the purpose of easily separating the material rod, does not need a large pulling force, and does not need to be forcibly removed when taking out, saves time and effort; the semi-automatic design improves the demolding efficiency and production efficiency, greatly reduces the non-effective production time, and achieves the effect of quickly separating the rod; reduces the noise during separation of the material rod, and silently separates the rod; by canceling the setting of the runner plate, the structure is simplified, the integration of the plastic mold is improved, the structure is optimized, the cost is reduced, and the occupied space is saved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 It is a closing state schematic diagram of the low-noise plastic mold of the present application.

[0031] Figure 2 It is an intermediate state schematic diagram of the low-noise plastic mold of the present application.

[0032] Figure 3 It is an opening state schematic diagram of the low-noise plastic mold of the present application.

[0033] Figure 4 It is a top view of the low-noise plastic mold of the present application.

[0034] Figure 5 It is a section view at A of the present application.

[0035] Figure 6 Fig. 1 is a schematic diagram of the material rod of the present application;

[0036] Figure 7 Fig. 2 is a schematic diagram of the spring material rod mechanism in the retracted state of the present application;

[0037] Figure 8 Fig. 3 is a schematic diagram of the spring material rod mechanism in the separated state of the present application;

[0038] Figure 9 Fig. 4 is a schematic diagram of the spring material rod mechanism in the expanded state of the present application.

[0039] Legend of reference signs:

[0040] 1, mold body; 2, fixed mold base plate; 3, fixed mold cavity plate; 4, movable mold cavity plate; 5, connecting rod mechanism; 51, connecting rod; 52, first pin shaft; 6, material rod; 61, clamping protrusion; 7, spring material rod mechanism; 71, housing; 72, clamping mechanism; 721, spring; 722, clamping arm; 723, clamping head; 724, clamping block; 725, second pin shaft; 726, recess; 8, chuck. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0045] Embodiment one

[0046] In combination Figures 1-9 As shown in the low-noise plastic mold provided by the embodiment, comprising:

[0047] The mold body 1 is sequentially provided with a fixed mold base plate 2, a fixed mold cavity plate 3 and a movable mold cavity plate 4 in the height direction from top to bottom.

[0048] The connecting rod mechanism 5 is formed by at least two connecting rods 51 connected end to end through a first pin shaft 52, one end of the connecting rod mechanism 5 is rotatably connected to the fixed mold base plate 2, and the other end is rotatably connected to the fixed mold cavity plate 3.

[0049] The fixed mold base plate 2 has an open mold state in which the connecting rods 51 are stretched to be collinear, and a closed mold state in which the connecting rods 51 are folded.

[0050] Specifically, it further comprises a material rod 6, one end of which is fixed in the fixed mold base plate 2, and the other end extends to the gate in the fixed mold cavity plate 3.

[0051] In the specific use process, the connecting rod mechanism 5 is a flexible mechanism formed by rotating pairs of two or more components, the components can be the connecting rods 51, the rotating pairs can be the first pin shaft 52, and the flexible mechanism can also be a hinge; both ends of the connecting rod mechanism 5 are pin-connected to the outer side wall of the fixed mold base plate 2 and the fixed mold cavity plate 3; when the mold is injection molded, the fixed mold base plate 2 is overlapped on the fixed mold cavity plate 3, the plastic mold is in a closed mold state, and the material rod; after the mold injection is completed, the plastic mold is opened, the plastic mold enters a gradual transition intermediate state from the closed mold state, and then enters a completely open mold state.

[0052] The fixed mold base plate 2 is driven by the injection molding machine to slowly move upward in the vertical direction, one end of the connecting rod mechanism 5 is subjected to tension, and gradually stretches with the displacement of the fixed mold base plate 2; the top of the material rod 6 is fixed in the fixed mold base plate 2, and the fixed mold base plate 2 simultaneously drives the material rod 6 to move upward, and the bottom end of the material rod 6 is disconnected from the sprue; the fixed mold base plate 2 continuously displaces upward, the material rod 6 gradually separates from the fixed mold cavity plate 3, until the connecting rod 51 stretches to the collinear state, the connecting rod mechanism 5 reaches the farthest stroke, the fixed mold base plate 2 is stopped by the connecting rod mechanism 5 The action of the pull bolt stops moving, the distance between the fixed mold base plate 2 and the fixed mold cavity plate 3 is greater than the length of the material rod 6, which ensures that the material rod 6 can be smoothly separated from the fixed mold base plate 2 and the fixed mold cavity plate 3 laterally; because the connecting rod mechanism 5 is a flexible locking mechanism, when the connecting rod mechanism 5 reaches the farthest stroke, it can effectively hold the fixed mold base plate 2 without generating collision and noise, realizing the mute of the mold opening action.

[0053] The low-noise plastic mold provided by the embodiment replaces the structure form of the distance-limiting pull rod and the limiting block in the prior art by arranging the connecting rod mechanism 5 which is respectively connected at both ends of the fixed mold base plate 2 and the fixed mold cavity plate 3, eliminates the collision caused by the structure, adopts flexible structure to limit the position, and realizes the purpose of greatly reducing the noise of the plastic mold during mold opening; the mold opening structure design is optimized, the noise reduction effect is good, the mold opening process is quiet to a certain extent, the application is flexible, the noise generated during the working process of the plastic mold is well controlled, a more beneficial working environment is provided for the physical and mental health of workers; and the limiting effect of the connecting rod mechanism 5 is stable and not easy to loosen, improves the production efficiency, prolongs the service life, improves the stability during the working process, and has high practical value.

[0054] Specifically, one end of the material rod 6 is formed with a clamping protrusion 61, and the material rod 6 is embedded and fixed in the fixed mold base plate 2 by the clamping protrusion 61.

[0055] In the specific use process, the clamping protrusion 61 can include a left clamping protrusion and a right clamping protrusion, and the clamping protrusion 61 is formed by extending the circumferential part of the outer wall of the top end of the material rod 6 in the horizontal direction to the far end, so that the fixed mold base plate 2 can drive the material rod 6 to separate from the sprue and the fixed mold cavity plate 3 when the fixed mold base plate 2 is opened, the clamping is stable, and the production efficiency is improved.

[0056] Specifically, it also includes a spring material rod mechanism 7 arranged in the fixed mold base plate 2 and suitable for clamping the clamping protrusion 61 to fix the material rod 6.

[0057] The spring material rod mechanism 7 includes a shell 71 and two groups of clamping mechanisms 72 capable of stably clamping the clamping protrusion 61.

[0058] The clamping mechanism 72 includes a spring 721, a clamping arm 722, two sets of clamping heads 723 and clamping blocks 724, which are symmetrically arranged in the cavity of the shell 71;

[0059] One end of the plurality of clamping blocks 724 is fixed to the surface of the fixed mold cavity plate 3 that is in contact with the fixed mold base plate 2;

[0060] The spring 721 is connected to one end of the clamping arm 722 away from the clamping head 723;

[0061] The middle section of the clamping arm 722 is fixed to the inner wall of the shell 71 by a second pin shaft 725, and the clamping arm 722 can rotate around the second pin shaft 725;

[0062] Two clamping heads 723 have recesses 726 formed on their contact surfaces;

[0063] The fixed mold base plate 2 is overlapped on the fixed mold cavity plate 3, the clamping blocks 724 are embedded in the gap between the clamping head 723 away from the recess 726 side and the shell 71, the spring 721 is compressed, and the clamping head 723 is closed to clamp the clamping protrusion 61;

[0064] The fixed mold base plate 2 and the fixed mold cavity plate 3 are separated, the clamping blocks 724 are separated from the shell 71, the spring 721 is elastically expanded to push the clamping arm 722 to rotate, and the clamping head 723 is separated to release the clamping protrusion 61.

[0065] In specific use, the spring material rod mechanism 7 is vertically built-in in the fixed mold base plate 2 and is fixedly engaged with the clamping protrusion 61 at the top of the material rod 6; the shape of the recess 726 matches the shape of the clamping protrusion 61, the clamping protrusion 61 can be spherical, and when the spring material rod mechanism 7 is closed, the inner wall of the recess 726 tightly wraps the outer wall of the clamping protrusion 61, which facilitates clamping the material rod 6 to prevent it from falling off.

[0066] During the injection molding process, the plastic mold is in the closed mold state, the fixed mold base plate 2 is overlapped on the fixed mold cavity plate 3, the spring material rod mechanism 7 is in the closed state, the clamping head 723 is embedded in the gap between the shell 71 and the side away from the material rod 6, the clamping mechanism 72 is locked, the spring 721 is compressed, and the top of the material rod 6 is fixed in the fixed mold base plate 2.

[0067] After the injection molding is completed, the fixed mold base plate 2 is gently opened, the plastic mold is in an intermediate state, the clamping blocks 724 on both sides gradually separate from the clamping mechanism 72, after the clamping blocks 724 completely separate, the springs 721 on both sides do work on the top end of the clamping arms 722 due to elastic potential energy, push the clamping arms 722 to rotate around the second pin shaft 725, the clamping heads 723 on both sides rotate away from the direction of the clamping protrusions 61 respectively, the material rod 6 is no longer restricted by the clamping mechanism 72, and the preliminary material rod removal operation is completed.

[0068] The fixed mold base plate 2 gradually moves upwards until the connecting rod mechanism 5 is in the farthest stroke state, the plastic mold is in the mold opening state, the fixed mold base plate 2 drives the material rod 6 to separate from the fixed mold cavity plate 3, and the fixed mold base plate 2 and the fixed mold cavity plate 3 leave a rod removal distance therebetween. The material rod 6 laterally separates from the plastic mold.

[0069] Optionally, in the prior art, a runner plate is used for the material rod 6 to perform the removal operation, generally by means of external force converted into strong pulling force to offset the reverse clamping force of the material rod 6 and the fixed mold base plate 2, which is unreasonable in design and generates a large noise; in the operation process of the plastic mold from the intermediate state to the mold opening state, the spring material rod pulling mechanism 7 can complete the preliminary separation from the material rod 6, so that the subsequent material rod 6 can be easily separated from the plastic mold, and therefore the runner plate can be cancelled, further reducing the mold opening noise.

[0070] Optionally, in the prior art, the limiting mechanism is respectively arranged on the fixed mold base plate 2 and the runner plate, the spring material rod pulling mechanism 7 cancels the setting of the runner plate due to the design of the structure, the connecting rod mechanism 5 is respectively fixed on the fixed mold base plate 2 and the fixed mold cavity plate 3, the structure of the plastic mold is simplified, the mold opening process is simplified, and the product production efficiency is improved.

[0071] Optionally, the spring material rod pulling mechanism 7 has other types of structural designs, the clamping mechanism 72 can be arranged in the shell 71 on one side, the clamping protrusion 61 is attached to the inner wall of the pit 726 on one side and the inner wall of the shell 71 on the other side, and the clamping block 724 is embedded in the gap between the clamping head 723 away from the material rod 6 and the shell 71 on one side; the application process of the variable form of the spring material rod pulling mechanism 7 is as described above, and will not be repeated here.

[0072] The low-noise plastic mold provided by the embodiment is provided with a spring material rod pulling mechanism 7 capable of being opened automatically when the plastic mold is opened, replacing the design of the material rod 6 being pulled off by external force in the prior art, achieving the purpose of easily separating the material rod 6, not needing a particularly large pulling force, not needing to be pulled off when taking out, saving time and effort, improving the demolding efficiency and production efficiency through the semi-automatic design, greatly reducing the non-effective production time, and achieving the effect of quickly pulling off the rod, reducing the noise when the material rod 6 is separated, and silently pulling off the rod, canceling the setting of the runner plate, simplifying the structure, improving the integration of the plastic mold, optimizing the structure, reducing the cost, and saving the occupied space.

[0073] Specifically, a plurality of the material rods 6 are arranged in parallel and at intervals in the mold body 1.

[0074] In the specific use process, a plurality of the material rods 6 are vertically arranged in the mold body 1, one end of the material rod 6 is fixed in the fixed mold base plate 2, and the other end is in contact with the sprue.

[0075] Specifically, the outer wall of the part of the material rod 6 close to one end of the clamping protrusion 61 extends to the horizontal direction and is connected to form a chuck 8.

[0076] In the specific use process, a plurality of the material rods 6 are connected by the chuck 8 to form an integral structure, which facilitates the simultaneous taking out of all the material rods 6, improves the production efficiency, greatly reduces the non-effective production time, and achieves the effect of quickly pulling off the rod.

[0077] Specifically, the straight line formed by the connection nodes of the connecting rod mechanism 5, the fixed mold base plate 2 and the fixed mold cavity plate 3 is perpendicular to the horizontal plane.

[0078] In the specific use process, when the connecting rod mechanism 5 is at the farthest stroke, the connecting rods 51 are collinear, and the connecting rod mechanism 5 is perpendicular to the horizontal plane, so that the distance between the fixed mold base plate 2 and the fixed mold cavity plate 3 is the maximum value, ensuring that the material rod 6 can be smoothly separated, and facilitating the operation of workers.

[0079] Specifically, a plurality of the connecting rod mechanisms 5 are arranged around the edge of the fixed mold base plate 2.

[0080] In the specific use process, a plurality of the connecting rod mechanisms 5 are evenly arranged around the side of the fixed mold base plate 2, and the two ends of the connecting rod mechanism 5 are respectively fixed on the side of the mold body 1; the length of each connecting rod mechanism 5 is the same when it is at the farthest stroke, ensuring the stability of the fixed mold base plate 2 when it is opened.

[0081] Specifically, a plurality of the spring material rod pulling mechanisms 7 are arranged in the fixed mold base plate 2 to clamp the clamping protrusion 61.

[0082] Specifically, the number of the spring material rod pulling mechanism 7 is the same as the number of the material rod 6.

[0083] In the specific use process, the spring material rod pulling mechanism 7 is connected with the material rod 6 one by one, which ensures the stability of the material rod 6 and reduces the installation time of the material rod 6, facilitating operation and saving time and effort.

[0084] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A low noise plastic mold characterized by, The utility model relates to a mould body (1) is provided with fixed die base plate (2), fixed die cavity plate (3) and movable die cavity plate (4) from top to bottom in turn along the height direction, connecting rod mechanism (5) is formed by at least two connecting rods (51) via first pin shaft (52) and is connected in series, one end of connecting rod mechanism (5) is rotatably connected on fixed die base plate (2), the other end is rotatably connected on fixed die cavity plate (3), fixed die base plate (2) has the open mould state of the connecting rod (51) stretching until collinear, and the die closing state of the connecting rod (51) folding, material rod (6) is fixed in fixed die base plate (2), and material rod (6) is formed with the clamping protrusion (61) in one end, spring material rod mechanism (7) is arranged in fixed die base plate (2), is suitable for fixed material rod (6), spring material rod mechanism (7) is suitable for clamping clamping protrusion (61) to fix material rod (6), spring material rod mechanism (7) includes the casing (71) and two groups of clamping mechanism (72) that can stably hold clamping protrusion (61), clamping mechanism (72) includes spring (721), clamping arm (722), clamping head (723) and card block (724), and two groups of clamping mechanism (72) are symmetrically arranged in the cavity of casing (71), a plurality of card block (724) one end is fixed on the surface of fixed die cavity plate (3) and fixed die base plate (2) is attached, the end of spring (721) and clamping arm (722) is connected away from clamping head (723), the middle section of clamping arm (722) is fixed in the inner wall of casing (71) by second pin shaft (725), and clamping arm (722) can rotate around second pin shaft (725), two clamping head (723) are formed with recess (726) on the attached surface, fixed die base plate (2) is overlapped on fixed die cavity plate (3), card block (724) is embedded in the gap of casing (71) on the side of clamping head (723) away from recess (726), spring (721) is compressed, and clamping head (723) folds and clamps clamping protrusion (61), fixed die base plate (2) and fixed die cavity plate (3) are separated, card block (724) is separated from casing (71), spring (721) is elastically expanded and pushes clamping arm (722) to rotate, and clamping head (723) is separated and releases clamping protrusion (61). The other end of material rod (6) extends to the gate in fixed die cavity plate (3). Material rod (6) is embedded and fixed in fixed die base plate (2) by clamping protrusion (61). A plurality of material rods (6) are parallel and spaced apart in the mould body (1). The part of the outer wall of the material rod (6) close to the clamping protrusion (61) extends towards the horizontal direction and is connected to form a chuck (8). The straight line formed by the connecting nodes of the connecting rod mechanism (5), the fixed die base plate (2) and the fixed die cavity plate (3) is perpendicular to the horizontal plane. ​ ​ ​ ​ ​ ​ ​ ​ 2. The low noise plastic mold of claim 1, wherein ​ 3. The low noise plastic mold of claim 2, wherein ​ 4. The low noise plastic mold of claim 2, wherein ​ 5. The low noise plastic mold of claim 1, wherein, ​ 6. The low noise plastic mold of claim 1, wherein ​ 7. The low noise plastic mold of claim 1, wherein A plurality of said connecting rod mechanisms (5) are arranged around the edge of said fixed mold base plate (2).

8. The low noise plastic mold of claim 1, wherein, A plurality of said spring material pulling rod mechanisms (7) are arranged in said fixed mold base plate (2) to clamp said clamping protrusions (61).

9. The low noise plastic mold of claim 1, wherein, The number of said spring material pulling rod mechanisms (7) is the same as the number of said material rods (6).

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