Ejection mechanism for plastic mold production

Abstract

The utility model discloses an ejection mechanism for plastic mould production, which comprises a supporting plate, supporting legs are fixedly mounted on two sides of the bottom of the supporting plate, a lower mould is fixedly mounted at the top of the supporting plate, supporting rods are fixedly mounted on two sides of the top of the supporting plate, and an ejection plate is fixedly mounted at the tops of the supporting rods. And an air cylinder is fixedly mounted at the top of the top plate. The air cylinder is used for driving the upper mold to move up and down, when the upper mold moves downwards, the upper mold and the lower mold are closed, after model injection molding is completed, the air cylinder drives the upper mold to move upwards again, the upper mold and the lower mold are opened again, and the upper mold drives the ejection mechanism to move upwards. The purpose of automatically demolding the model in the lower mold is achieved, the demolding efficiency of the model is improved, and meanwhile the problem that the demolding efficiency of the plastic model is reduced due to the fact that the plastic is soft and inconvenient to demold when the plastic is opened is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic mold production, in particular to an ejection mechanism for plastic mold production. Background Art

[0002] Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion molding, injection molding, blow molding and low-foaming molding. The coordinated changes of the mold convex and concave molds and the auxiliary molding system can process a series of plastic parts of different shapes and sizes.

[0003] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: in the plastic mold production process, the mold is opened after the plastic injection molding is completed, and the plastic is taken out after the mold is opened. However, when the plastic is opened, it is inconvenient to demold because the plastic is relatively soft, which reduces the demolding efficiency of the plastic model; therefore, in order to solve the above problems, an ejection mechanism for plastic mold production is proposed. Utility Model Content

[0004] The utility model aims to provide an ejection mechanism for plastic mold production, which has the advantage of improving the demoulding efficiency of the plastic model and solves the problem that the demoulding efficiency of the plastic model is reduced due to the inconvenience of demoulding the plastic due to the plastic being relatively soft when the plastic is opened.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ejection mechanism for plastic mold production, comprising a support plate, support legs are fixedly installed on both sides of the bottom of the support plate, a lower mold is fixedly installed on the top of the support plate, support rods are fixedly installed on both sides of the top of the support plate, a top plate is fixedly installed on the top of the support rods, a cylinder is fixedly installed on the top of the top plate, an upper mold is fixedly installed on the output end of the cylinder, ejection mechanisms are arranged on both sides of the lower mold, and a through groove is opened at the bottom of the lower mold.

[0006] The effects achieved by the above components are as follows: by setting a cylinder to drive the upper mold to move up and down, when the upper mold moves down, the upper mold and the lower mold are closed, and after the injection molding of the model is completed, the cylinder drives the upper mold to move up again, the upper mold and the lower mold are opened, and the upper mold drives the ejection mechanism to move upward, and the ejection mechanism is set to demold the model inside the lower mold, so as to achieve the purpose of automatic demolding of the model inside the lower mold and improve the demolding efficiency of the model.

[0007] Preferably, the ejection mechanism includes two L-shaped tooth plates, which are respectively fixedly mounted on both sides of the upper mold, and both sides of the top of the support plate are rotatably connected with a driven gear and a driving gear, and the driving gear is located on the front side of the driven gear. The L-shaped tooth plate is meshed with the driving gear, and both sides of the top of the support plate are slidably connected with a mobile tooth plate, and the driven gear is located on the top of the mobile tooth plate and meshes with the mobile tooth plate. An ejection plate is provided at the bottom of the inner cavity of the lower mold, and a connecting rod is fixedly mounted on the bottom of the ejection plate, and first inclined plane blocks are fixedly mounted on both sides of the connecting rod, and the relatively close side of the mobile tooth plate is located inside the through groove and fixedly mounted with a second inclined plane block.

[0008] The effect achieved by the above components is: when the upper mold moves upward, the upper mold drives the L-shaped toothed plate to move upward, and then the L-shaped toothed plate drives the active gear to rotate, and the active gear drives the driven gear to rotate synchronously, and further the driven gear drives the moving toothed plate to move, so that the moving toothed plate drives the second inclined plane block to move in a relatively close direction, so that the second inclined plane block will squeeze the first inclined plane block, so that the first inclined plane block is squeezed and moves upward, so that the first inclined plane block drives the connecting rod and the ejector plate to move upward, and the ejector plate ejects the model in the inner cavity of the lower mold, so that the model can be demoulded conveniently.

[0009] Preferably, a recess is formed at the bottom of the connecting rod, a tension spring is fixedly installed inside the recess, and the bottom of the tension spring is fixedly connected to the top of the support plate.

[0010] The effect achieved by the above components is: by setting a tension spring to pull the connecting rod, it is convenient to pull the ejector plate downward, so that the ejector plate is reset to the bottom of the lower mold cavity.

[0011] Preferably, the inclined surface of the second inclined surface block is provided with a pulley, and the pulley is located below the top of the inclined surface of the first inclined surface block.

[0012] The effect achieved by the above components is: by arranging the pulley to reduce the friction force when the second inclined plane block contacts the first inclined plane block, the smoothness when the second inclined plane block presses the first inclined plane block is improved.

[0013] Preferably, both sides of the top of the support plate are provided with empty grooves, and the empty grooves are located below the bottom of the L-shaped tooth plate.

[0014] The effect achieved by the above components is: the empty slot is provided to prevent the support plate from interfering with the downward movement of the L-shaped tooth plate.

[0015] Preferably, a guide rod is fixedly mounted on the top of the support plate, a limiting groove is provided on the bottom of the movable tooth plate, and the guide rod is clamped inside the limiting groove.

[0016] The effect achieved by the above components is: by setting the guide rod and the limiting groove to cooperate with each other to limit the movable tooth plate, the stability of the movable tooth plate when moving left and right is improved.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] The utility model provides an air cylinder to drive the upper mold to move up and down. When the upper mold moves down, the upper mold and the lower mold are molded together. After the injection molding of the model is completed, the air cylinder drives the upper mold to move up again, and the upper mold and the lower mold are opened. The upper mold drives the ejection mechanism to move upward. The ejection mechanism is provided to demould the model inside the lower mold, so as to achieve the purpose of automatically demoulding the model inside the lower mold, improve the demoulding efficiency of the model, and solve the problem that when the plastic is opened, it is inconvenient to demould because the plastic is relatively soft, thereby reducing the demoulding efficiency of the plastic model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the lower die of the utility model;

[0021] Figure 3 This is a schematic diagram of the ejection mechanism structure of the utility model;

[0022] Figure 4 For this utility model Figure 2 A partial enlarged view of the middle A;

[0023] Figure 5 For this utility model Figure 2 A partial enlarged view of point B in the middle.

[0024] In the figure: 1. support plate; 2. ejection mechanism; 201. L-shaped tooth plate; 202. driven gear; 203. driving gear; 204. movable tooth plate; 205. ejection plate; 206. connecting rod; 207. first inclined block; 208. recess; 209. tension spring; 210. second inclined block; 211. pulley; 3. support leg; 4. lower die; 5. support rod; 6. ejector plate; 7. cylinder; 8. upper die; 9. empty slot; 10. guide rod; 11. through slot. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 A ejection mechanism for plastic mold production includes a support plate 1, support legs 3 are fixedly installed on both sides of the bottom of the support plate 1, a lower mold 4 is fixedly installed on the top of the support plate 1, support rods 5 are fixedly installed on both sides of the top of the support plate 1, a top plate 6 is fixedly installed on the top of the support rods 5, a cylinder 7 is fixedly installed on the top of the top plate 6, an upper mold 8 is fixedly installed on the output end of the cylinder 7, ejection mechanisms 2 are arranged on both sides of the lower mold 4, and a through groove 11 is opened at the bottom of the lower mold 4.

[0027] Specifically, the ejection mechanism 2 includes two L-shaped tooth plates 201, which are fixedly installed on both sides of the upper mold 8, respectively. Both sides of the top of the support plate 1 are rotatably connected with a driven gear 202 and a driving gear 203, respectively. The driving gear 203 is located on the front of the driven gear 202, and the L-shaped tooth plate 201 is meshed with the driving gear 203. Both sides of the top of the support plate 1 are slidably connected with a mobile tooth plate 204, and the driven gear 202 is located on the top of the mobile tooth plate 204 and meshes with the mobile tooth plate 204. An ejection plate 205 is provided at the bottom of the inner cavity of the lower mold 4, and a connecting rod 206 is fixedly installed at the bottom of the ejection plate 205. Both sides of the connecting rod 206 are fixedly installed with a first inclined surface block 207, and the relatively close side of the mobile tooth plate 204 is located inside the through groove 11 and is fixedly installed with a second inclined surface block 210.

[0028] Specifically, a recess 208 is formed at the bottom of the connecting rod 206 , and a tension spring 209 is fixedly installed inside the recess 208 . The bottom of the tension spring 209 is fixedly connected to the top of the support plate 1 .

[0029] The tension spring 209 is used to pull the connecting rod 206 , thereby facilitating the ejection plate 205 to be pulled downward, so that the ejection plate 205 is reset to the bottom of the inner cavity of the lower mold 4 .

[0030] Specifically, the inclined surface of the second inclined surface block 210 is provided with a pulley 211 , and the pulley 211 is located below the top of the inclined surface of the first inclined surface block 207 .

[0031] The pulley 211 is used to reduce the friction force when the second inclined surface block 210 contacts the first inclined surface block 207 , thereby improving the smoothness when the second inclined surface block 210 presses the first inclined surface block 207 .

[0032] Specifically, both sides of the top of the support plate 1 are provided with empty slots 9 , and the empty slots 9 are located below the bottom of the L-shaped tooth plate 201 .

[0033] The empty slot 9 is used to prevent the support plate 1 from interfering with the downward movement of the L-shaped tooth plate 201 .

[0034] Specifically, a guide rod 10 is fixedly installed on the top of the support plate 1, and a limiting groove is provided at the bottom of the movable tooth plate 204, and the guide rod 10 is clamped inside the limiting groove.

[0035] The guide rod 10 and the limiting groove cooperate with each other to limit the movable tooth plate 204, thereby improving the stability of the movable tooth plate 204 when moving left and right.

[0036] When in use, the cylinder 7 drives the upper mold 8 to move up and down. When the upper mold 8 moves down, the upper mold 8 and the lower mold 4 are molded. After the injection molding of the model is completed, the cylinder 7 drives the upper mold 8 to move up again, the upper mold 8 and the lower mold 4 are opened, and the upper mold 8 drives the ejection mechanism 2 to move upward. When the upper mold 8 moves up, the upper mold 8 drives the L-shaped toothed plate 201 to move up, and then the L-shaped toothed plate 201 drives the active gear 203 to rotate, and the active gear 203 drives the driven gear 202 to rotate synchronously, and further the driven gear 202 drives the moving toothed plate 204 to move, so that the moving toothed plate 204 drives the second inclined surface block 210 to move in a relatively close direction, so that the second inclined surface block 210 will squeeze the first inclined surface block 207, so that the first inclined surface block 207 is squeezed and moves upward, so that the first inclined surface block 207 drives the connecting rod 206 and the ejector plate 205 to move upward, and the ejector plate 205 ejects the model in the inner cavity of the lower mold 4, which is convenient for demoulding the model.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ejection mechanism for plastic mold production, comprising a support plate (1), characterized in that: Support legs (3) are fixedly mounted on both sides of the bottom of the support plate (1), a lower mold (4) is fixedly mounted on the top of the support plate (1), support rods (5) are fixedly mounted on both sides of the top of the support plate (1), a top plate (6) is fixedly mounted on the top of the support rods (5), a cylinder (7) is fixedly mounted on the top of the top plate (6), an upper mold (8) is fixedly mounted on the output end of the cylinder (7), ejection mechanisms (2) are arranged on both sides of the lower mold (4), and a through groove (11) is provided at the bottom of the lower mold (4).

2. The ejection mechanism for plastic mold production according to claim 1, characterized in that: The ejection mechanism (2) comprises two L-shaped toothed plates (201), the two L-shaped toothed plates (201) are respectively fixedly mounted on both sides of the upper mold (8), both sides of the top of the support plate (1) are respectively rotatably connected with a driven gear (202) and a driving gear (203), the driving gear (203) is located on the front side of the driven gear (202), the L-shaped toothed plates (201) are meshed with the driving gear (203), and both sides of the top of the support plate (1) are slidably connected with a movable toothed plate (204) ), the driven gear (202) is located at the top of the moving tooth plate (204) and meshes with the moving tooth plate (204), an ejector plate (205) is provided at the bottom of the inner cavity of the lower mold (4), a connecting rod (206) is fixedly installed at the bottom of the ejector plate (205), and first bevel blocks (207) are fixedly installed on both sides of the connecting rod (206), and the relatively close side of the moving tooth plate (204) is located inside the through groove (11) and fixedly installed with a second bevel block (210).

3. The ejection mechanism for plastic mold production according to claim 2, characterized in that: A recess (208) is provided at the bottom of the connecting rod (206), a tension spring (209) is fixedly installed inside the recess (208), and the bottom of the tension spring (209) is fixedly connected to the top of the support plate (1).

4. The ejection mechanism for plastic mold production according to claim 2, characterized in that: The inclined surface of the second inclined surface block (210) is provided with a pulley (211), and the pulley (211) is located below the top of the inclined surface of the first inclined surface block (207).

5. The ejection mechanism for plastic mold production according to claim 1, characterized in that: Empty grooves (9) are provided on both sides of the top of the support plate (1), and the empty grooves (9) are located below the bottom of the L-shaped tooth plate (201).

6. The ejection mechanism for plastic mold production according to claim 2, characterized in that: A guide rod (10) is fixedly mounted on the top of the support plate (1), a limiting groove is provided at the bottom of the movable tooth plate (204), and the guide rod (10) is clamped inside the limiting groove.

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