Injection mold capable of accurately adjusting height of mold cavity

Abstract

The invention discloses an injection mold capable of accurately adjusting the height of a mold cavity, and relates to the field of injection molds, the injection mold comprises a base, the four corners of the base and a top plate are integrally mounted through connecting rods, the use stability of the mold is guaranteed, and the top of the base is fixedly connected with a lower mold body; the mold comprises a lower mold main body and an upper mold main body, the lower mold main body is movably connected with the upper mold main body, a mounting groove is formed in the lower mold main body, an inner mold main body is fixedly mounted on the inner wall of the mounting groove, the inner mold main body is movably connected with a movable square groove formed in the upper mold main body, and an injection molding opening is formed in the upper mold main body. The top of a torsion driving rod is fixedly connected with a rotating wheel, two sets of screws are driven to synchronously rotate through transmission of a chain, then lifting operation of the upper mold body is achieved, and therefore the height of a cavity between the inner mold bodies is conveniently adjusted, and adjustment of the interiors of the mold bodies is completed; the adjustment accuracy of the upper die body is ensured.

Description

Technical Field

[0001] The invention relates to the field of injection molds, in particular to an injection mold capable of accurately adjusting the height of a mold cavity. Background Art

[0002] Moulds are tools used by the manufacturing industry to shape products or mass produce them. Injection moulds are specifically used in the production of plastic products. Injection moulds can produce plastic products that are light in weight, high in strength, good in toughness, corrosion-resistant, good in insulation, easy to colour, easy to shape and low in cost. These products have penetrated into various sectors of the national economy, such as aviation, electronics, machinery, automobiles and daily life.

[0003] The existing Chinese patent authorization announcement number: CN115990977A, discloses a mold cavity height adjustment device and a mold, which includes a lower mold and an upper mold, a first placement groove is opened on the top of the lower mold, an inner mold is fixedly installed inside the first placement groove, the height of the inner mold is greater than the height of the lower mold, a second placement groove is opened at the bottom of the upper mold, and an inner module is fixedly installed inside the second placement groove, the upper mold is located above the lower mold, and the second placement groove at the bottom of the upper mold is sleeved on the outer wall of the inner mold. The invention can adjust the position height of the limit ring by adjusting the length of the four threaded support rods inserted into the positioning groove, and the bottom of the upper mold contacts the top of the limit ring, so that the change in the position height of the limit ring will change the length of the inner module inserted into the inner mold cavity, the more the inner module is inserted into the inner mold cavity, the smaller the cavity space of the inner mold will be, and vice versa, thereby achieving the purpose of adjusting the mold cavity height adjustment device.

[0004] The above-mentioned mold still has the following problems when in use: when adjusting the height of the internal cavity of the injection mold, it is necessary to simultaneously twist four sets of bolts to adjust the height of the cavity, which makes the entire adjustment process more cumbersome and greatly reduces the applicability of the injection mold.

[0005] Therefore, it is necessary to invent an injection mold that can accurately adjust the mold cavity height to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide an injection mold for accurately adjusting the height of the mold cavity, so as to solve the problem raised in the above-mentioned background technology that when adjusting the height of the internal cavity of the injection mold, four sets of bolts need to be twisted synchronously to achieve the adjustment of the cavity height, which makes the entire adjustment process more cumbersome and greatly reduces the applicability of the injection mold.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection mold for accurately adjusting the height of a mold cavity, comprising a base, wherein the four corners of the base are integrally installed with a top plate through connecting rods to ensure the stability of the mold, and the top of the base is fixedly connected with a lower mold body, and the lower mold body is movably connected with an upper mold body, an installation groove is provided inside the lower mold body, and an inner mold body is fixedly installed on the inner wall of the installation groove, and the inner mold body is movably connected with a movable square groove provided inside the upper mold body, an injection port is provided inside the upper mold body, and a cavity is provided inside the lower mold body, and the cavity is not connected to the installation groove, and further comprising:

[0008] The ejector assembly includes an ejector rod and a disc movably connected to the cavity through a spring, and the ejector rod and the disc are installed in an integrated manner, so that the ejector rod can movably eject the model during subsequent demoulding for easy removal;

[0009] Linkage assembly, the inner wall of the cavity is rotatably connected with a rotating rod 1 and a rotating rod 2, and the rotating rod 1 and the rotating rod 2 are movably connected, the transmission of the rotating rod 1 and the rotating rod 2 in different directions is not affected, and the outer rings of the rotating rod 1 and the rotating rod 2 are fixedly sleeved with gears, the gears are meshed with the toothed plate, and the toothed plate is fixedly connected to the bottom of the upper mold body, so that it is convenient to drive the rotation of the rotating rod 1 and the rotating rod 2 when the upper mold body moves, the outer rings of the rotating rod 1 and the rotating rod 2 are fixedly connected with cams, and the cams can abut against the disc, when the rotating rod 1 and the rotating rod 2 rotate, the cams move synchronously to touch the ejection assembly, so as to realize the autonomous ejection of the model inside the mold body;

[0010] A lifting assembly, wherein the two side walls of the upper mold body are fixedly connected with side blocks, and the top of the side blocks are fixedly connected with screws, the screws are threadedly connected to the top plate, and the screws are threadedly connected to the bolts, the top of the top plate is rotatably connected with an active rod through a bearing, and the active rod and the bolts are transmission connected through a chain, which facilitates the adjustment of the height position of the upper mold body and realizes the adjustment of the height of the cavity inside the mold body.

[0011] Preferably, the upper end of the ejector rod passes through the interior of the lower mold body and extends to the interior of the mounting groove, and the upper end of the ejector rod also passes through and extends to the interior of the inner mold body fixedly connected to the inner wall of the mounting groove, and the top end of the ejector rod is flush with the inner bottom wall of the inner mold body, so that the ejector rod can be ejected by external force, which is convenient for demoulding of the molding mold;

[0012] The two ejector rods are arranged in parallel and staggered, so that when the upper mold body moves, the two sets of ejector rods move synchronously to realize the ejection operation of the model.

[0013] Preferably, the two ends of the spring are fixedly connected to the inner wall of the cavity and the disc respectively, and the spring is movably sleeved on the outer ring of the ejector rod to facilitate the reset movement of the ejector rod when it is no longer subjected to force, thereby ensuring that the internal cavity of the inner mold body can perform injection molding operations normally.

[0014] Preferably, the two ends of the rotating rod 1 and the rotating rod 2 which are farther away from each other are rotatably connected to the inner wall of the cavity through bearings respectively;

[0015] The rotating rod 1 and the rotating rod 2 are arranged alternately, and a groove is opened inside the rotating rod 2, and the inner wall of the groove is in contact with the outer wall of the rotating rod 1 to realize a rotational connection, so that the rotating rod 1 and the rotating rod 2 are not affected when they rotate in different directions, and the rotation stability of the rotating rod 1 and the rotating rod 2 can also be guaranteed.

[0016] Preferably, the two tooth plates are staggered, and different sides of the two tooth plates are meshedly connected with gears fixedly sleeved on the outer rings of rotating rod one and rotating rod two, so that when the upper mold body moves to mobilize the tooth plates on different sides to mesh with the gears, the rotating rod one and rotating rod two are driven to rotate in different directions, thereby causing the cams to rotate in different directions to press against the ejector rods arranged on different sides, so that the model inside the mold is ejected.

[0017] Preferably, a notch is provided inside the tooth plate, and a scale is fixedly connected to the inner wall of the notch, so as to ensure accurate control of the movable space of the upper mold body.

[0018] Preferably, there are two screws in number and the two screws are arranged in parallel, and the bolts connected by the outer threads of the two screws are always installed in close contact with the top plate, and the upper mold body is driven to move when the torsion active rod mobilizes the two sets of bolts to rotate simultaneously.

[0019] Preferably, an active rod is rotatably connected between the two groups of bolts, and the diameter of the outer ring of the sprocket to which the outer ring of the active rod is fixedly sleeved is slightly larger than the diameter of the outer ring of the sprocket to which the outer ring of the bolts is fixedly sleeved, and the three groups of sprockets are transmission connected by chains, so that the movement of the upper mold body can be driven by only twisting the active rod to mobilize the two groups of bolts to rotate at the same time.

[0020] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0021] 1. The present invention realizes the lifting operation of the upper mold body by twisting the rotating wheel fixedly connected to the top of the active rod, and driving the two sets of bolts to rotate synchronously through the transmission of the chain, so as to facilitate the adjustment of the cavity height between the inner mold bodies to complete the adjustment inside the mold body. A scale is embedded and installed inside the tooth plate, so as to ensure the accuracy of the adjustment of the upper mold body;

[0022] 2. The continuous lifting movement of the upper mold body drives the rotation of the gear meshing with the tooth plate, and then drives the rotation of the rotating rod 1 and the rotating rod 2, so that the cam rotates to contact the ejector rod and support the ejector rod, so that the ejector rod moves to eject the injection molded model, which is convenient for the subsequent removal of the entire model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the structure magnification effect at A in the middle;

[0026] Figure 3 It is an exploded view of the connection structure between the upper mold body (partially cut away) and the lower mold body of the present invention;

[0027] Figure 4 It is a three-dimensional diagram of the internal structure of the lower mold body (partially cut away) of the present invention;

[0028] Figure 5 It is a three-dimensional diagram of the connection structure between the ejection assembly and the linkage assembly of the present invention;

[0029] Figure 6 It is a three-dimensional diagram of the connection structure of the upper mold body and the lower mold body (partially cut away) of the present invention.

[0030] Description of reference numerals:

[0031] 1. Base; 2. Top plate; 3. Connecting rod; 4. Upper mold body; 5. Lower mold body; 6. Mounting groove; 7. Inner mold body; 8. Injection port; 9. Movable square groove; 10. Cavity; 11. Ejector assembly; 111. Ejector rod; 112. Disc; 113. Spring; 12. Linkage assembly; 121. Rotating rod 1; 122. Rotating rod 2; 123. Groove; 124. Gear; 125. Tooth plate; 126. Cam; 13. Notch; 14. Scale; 15. Lifting assembly; 151. Side block; 152. Screw; 153. Bolt; 154. Active rod; 155. Chain. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The present invention provides Figure 1-6 The injection mold for accurately adjusting the height of the mold cavity shown includes a base 1, and the four corners of the base 1 are integrally installed with the top plate 2 through connecting rods 3 to ensure the stability of the mold, and the top of the base 1 is fixedly connected with a lower mold body 5, and the lower mold body 5 is movably connected with the upper mold body 4, and the lower mold body 5 is provided with a mounting groove 6, and the inner mold body 7 is fixedly installed on the inner wall of the mounting groove 6, and the inner mold body 7 is movably connected with the movable square groove 9 provided inside the upper mold body 4, and the upper mold body 4 is provided with an injection port 8, and the lower mold body 5 is provided with a cavity 10, and the cavity 10 is not connected with the mounting groove 6, and also includes:

[0034] The ejector assembly 11, the interior of the cavity 10 is movably connected with an ejector rod 111 and a disc 112 through a spring 113, and the ejector rod 111 and the disc 112 are installed in an integrated manner, so that when the mold is subsequently demoulded, the ejector rod 111 can be moved to eject the model for easy removal;

[0035] The linkage assembly 12, the inner wall of the cavity 10 is rotatably connected with a rotating rod 121 and a rotating rod 2 122, and the rotating rod 121 and the rotating rod 2 122 are movably connected, and the different directional transmission of the rotating rod 121 and the rotating rod 2 122 is not affected, and the outer rings of the rotating rod 121 and the rotating rod 2 122 are fixedly sleeved with a gear 124, the gear 124 is meshed with a toothed plate 125, and the toothed plate 125 is fixedly connected to the bottom of the upper mold body 4, so that it is convenient to drive the rotation of the rotating rod 121 and the rotating rod 2 122 when the upper mold body 4 moves, and the outer rings of the rotating rod 121 and the rotating rod 2 122 are fixedly connected with a cam 126, and the cam 126 can abut against the disc 112, when the rotating rod 121 and the rotating rod 2 122 rotate, the cam 126 synchronously moves to touch the ejection assembly 11, so as to realize the autonomous ejection of the internal model of the mold body;

[0036] The lifting assembly 15, the two side walls of the upper mold body 4 are fixedly connected with side blocks 151, and the top of the side block 151 is fixedly connected with a screw rod 152, the screw rod 152 is threadedly connected to the top plate 2, and the screw rod 152 is threadedly connected to the bolt 153, the top of the top plate 2 is rotatably connected with an active rod 154 through a bearing, and the active rod 154 and the bolt 153 are driven by a chain 155, which is convenient for adjusting the height position of the upper mold body 4 and realizing the adjustment of the height of the internal cavity of the mold body.

[0037] The upper end of the ejector rod 111 penetrates the interior of the lower mold body 5 and extends to the interior of the mounting groove 6, and the upper end of the ejector rod 111 also penetrates and extends to the interior of the inner mold body 7 fixedly connected to the inner wall of the mounting groove 6, and the top of the ejector rod 111 is flush with the inner bottom wall of the inner mold body 7, so that the ejector rod 111 can be ejected by external force, which is convenient for demoulding of the molding mold;

[0038] The two ejector rods 111 are arranged in parallel and staggered, so that when the upper mold body 4 moves, the two sets of ejector rods 111 move synchronously to realize the ejection operation of the model.

[0039] The two ends of the spring 113 are fixedly connected to the inner wall of the cavity 10 and the disc 112 respectively, and the spring 113 is movably sleeved on the outer ring of the ejector rod 111 to facilitate the reset movement of the ejector rod 111 when it is no longer subjected to force, thereby ensuring that the internal cavity of the inner mold body 7 can perform injection molding normally later.

[0040] The two ends of the rotating rod 121 and the rotating rod 2 122 which are farther away from each other are rotatably connected to the inner wall of the cavity 10 through bearings respectively;

[0041] The rotating rod 121 and the rotating rod 2 122 are arranged alternately, and a groove 123 is opened inside the rotating rod 2 122, and the inner wall of the groove 123 is in contact with the outer wall of the rotating rod 1 121 to achieve a rotational connection, so that the rotating rod 1 121 and the rotating rod 2 122 are not affected when they rotate in different directions, and the rotation stability of the rotating rod 1 121 and the rotating rod 2 122 can also be guaranteed.

[0042] The two tooth plates 125 are arranged alternately, and different sides of the two tooth plates 125 are meshed and connected with the gears 124 fixedly sleeved on the outer circles of the rotating rods 121 and 122. In this way, when the upper mold body 4 moves to mobilize the tooth plates 125 on different sides to mesh and connect with the gears 124, the rotating rods 121 and 122 are driven to rotate in different directions, thereby causing the cams 126 to rotate in different directions against the ejector rods 111 arranged on different sides, so that the model inside the mold is ejected.

[0043] A notch 13 is provided inside the tooth plate 125 , and a scale 14 is fixedly connected to the inner wall of the notch 13 , so as to ensure accurate control of the movable space of the upper mold body 4 .

[0044] There are two screw rods 152, and the two screw rods 152 are arranged in parallel, and the bolts 153 connected by the outer threads of the two screw rods 152 are always installed in close contact with the top plate 2, and the upper mold body 4 is driven to move when the torsion active rod 154 mobilizes the two groups of bolts 153 to rotate simultaneously.

[0045] An active rod 154 is rotatably connected between the two groups of bolts 153, and the outer diameter of the sprocket wheel fixedly sleeved on the outer ring of the active rod 154 is slightly larger than the outer diameter of the sprocket wheel fixedly sleeved on the outer ring of the bolts 153, and the three groups of sprocket wheels are connected by a chain 155. In this way, the movement of the upper mold body 4 can be driven by twisting the active rod 154 to mobilize the two groups of bolts 153 to rotate at the same time.

[0046] Working principle: When using an injection mold for accurately adjusting the height of the mold cavity, when the height of the cavity needs to be adjusted first, the rotating wheel fixedly connected to the top of the active rod 154 is twisted, and then the two sets of bolts 153 are driven to rotate synchronously through the transmission of the chain 155. At this time, the screw 152 connected to the side block 151 fixedly connected to the two side walls of the upper mold body 4 is threadedly connected to the top plate 2, and the bolt 153 rotates in contact with the top of the top plate 2. In this way, when the bolt 153 rotates, the height position of the upper mold body 4 can be effectively adjusted, and the movable square groove 9 opened inside the upper mold body 4 moves inside the inner mold body 7, thereby adjusting the height distance of the top of the cavity inside the inner mold body 7 in real time, thereby adjusting the height of the cavity. At the same time, a scale 14 is embedded and installed inside the tooth plate 125, so as to ensure the accuracy of the adjustment of the upper mold body 4.

[0047] The continuous lifting movement of the upper mold body 4 drives the tooth plates 125 fixedly connected at different positions on both sides of the upper mold body 4 to move, and the tooth plates 125 drive the rotation of the gears 124 meshing therewith, and the two groups of gears 124 respectively drive the rotating rod 121 and the rotating rod 122 to rotate in different directions, so that the two groups of cams 126 of the outer ring fixed sleeves of the rotating rod 121 and the rotating rod 122 can realize different directions of rotation and contact with the two groups of ejector rods 111 set in different directions and support the movement of the ejector rods 111, so that the ejector rods 111 move to eject the injection molded model, thereby facilitating the subsequent removal of the entire model.

[0048] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An injection mold for accurately adjusting the mold cavity height, comprising a base (1), characterized in that: The four corners of the base (1) are integrally mounted with the top plate (2) via connecting rods (3), and a lower mold body (5) is fixedly connected to the top of the base (1), and the lower mold body (5) is movably connected to the upper mold body (4), a mounting groove (6) is provided inside the lower mold body (5), and an inner mold body (7) is fixedly installed on the inner wall of the mounting groove (6), and the inner mold body (7) is movably connected to a movable square groove (9) provided inside the upper mold body (4), an injection port (8) is provided inside the upper mold body (4), a cavity (10) is provided inside the lower mold body (5), and the cavity (10) is not connected to the mounting groove (6), and further comprises: An ejection assembly (11), wherein an ejection rod (111) and a disc (112) are movably connected inside the cavity (10) via a spring (113), and the ejection rod (111) and the disc (112) are installed in an integrated manner; A linkage assembly (12), wherein the inner wall of the cavity (10) is rotatably connected with a rotating rod 1 (121) and a rotating rod 2 (122), and the rotating rod 1 (121) and the rotating rod 2 (122) are movably connected, and the outer rings of the rotating rod 1 (121) and the rotating rod 2 (122) are fixedly sleeved with a gear (124), the gear (124) is meshedly connected with a toothed plate (125), and the toothed plate (125) is fixedly connected to the bottom of the upper mold body (4), and the outer rings of the rotating rod 1 (121) and the rotating rod 2 (122) are fixedly connected with a cam (126), and the cam (126) can abut against the disc (112); A lifting assembly (15), wherein the two side walls of the upper mold body (4) are fixedly connected with side blocks (151), and the top of the side blocks (151) is fixedly connected with a screw rod (152), the screw rod (152) is threadedly connected to the top plate (2), and the screw rod (152) is threadedly connected to the bolt (153), the top of the top plate (2) is rotatably connected with an active rod (154) through a bearing, and the active rod (154) and the bolt (153) are transmission-connected through a chain (155).

2. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: The upper end of the ejector rod (111) passes through the interior of the lower mold body (5) and extends to the interior of the mounting groove (6), and the upper end of the ejector rod (111) also passes through and extends to the interior of the inner mold body (7) fixedly connected to the inner wall of the mounting groove (6), and the top end of the ejector rod (111) is flush with the inner bottom wall of the inner mold body (7); The two ejector rods (111) are arranged in parallel and staggered.

3. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: The two ends of the spring (113) are respectively fixedly connected to the inner wall of the cavity (10) and the disc (112), and the spring (113) is movably sleeved on the outer ring of the ejection rod (111).

4. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: The two ends of the rotating rod 1 (121) and the rotating rod 2 (122) which are farther apart are rotatably connected to the inner wall of the cavity (10) via bearings respectively; The rotating rod 1 (121) and the rotating rod 2 (122) are arranged alternately, and a groove (123) is opened inside the rotating rod 2 (122), and the inner wall of the groove (123) is in contact with the outer wall of the rotating rod 1 (121) to achieve a rotating connection.

5. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: The two tooth plates (125) are arranged alternately, and different sides of the two tooth plates (125) are meshedly connected with gears (124) fixedly sleeved on the outer rings of the first rotating rod (121) and the second rotating rod (122).

6. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: A notch (13) is provided inside the tooth plate (125), and a scale (14) is fixedly connected to the inner wall of the notch (13).

7. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: The screw rods (152) are provided in two numbers, and the two screw rods (152) are arranged in parallel, and the bolts (153) connected by the outer threads of the two screw rods (152) are always installed in close contact with the top plate (2).

8. The injection mold for accurately adjusting the mold cavity height according to claim 1, characterized in that: An active rod (154) is rotatably connected between the two groups of bolts (153), and the diameter of the outer ring of the sprocket to which the outer ring of the active rod (154) is fixedly sleeved is slightly larger than the diameter of the outer ring of the sprocket to which the outer ring of the bolts (153) is fixedly sleeved, and the three groups of sprockets are transmission-connected via chains (155).

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