A moulding press for the production of plastic articles with ejection

Abstract

The application relates to the technical field of plastic product production, in particular to a mold pressing forming equipment with ejection effect for plastic product production, which comprises a base, a guide rod, a second hydraulic oil cylinder and a top base, characterized in that the outer surface of the base is fixed with the guide rod, the top end of the guide rod is fixed with the top base, the outer surface of the guide rod is slidably connected with a mold pressing base, the outer surface of the top base is fixed with the second hydraulic oil cylinder, the output end of the second hydraulic oil cylinder is fixedly connected with the top end of the mold pressing base, the bottom end of the mold pressing base is fixed with an upper mold, the upper surface of the base is fixed with a lower mold, both sides of the lower mold are provided with ejection mechanisms, the ejection mechanisms comprise fixing bases and flow guide bases, and the fixing bases are embedded in the base. The side-hidden ejection mechanism is adopted, rapid demolding is facilitated, and the integrity of the mold is not damaged.

Description

Technical Field

[0001] This invention relates to the field of plastic product manufacturing technology, specifically to a compression molding equipment for producing plastic products with an ejection effect. Background Technology

[0002] Plastic compression molding is a method of compression molding, and it is one of the oldest and most important molding methods for thermosetting plastics. Compression molding can be divided into die molding and lamination molding based on the properties of the material and the characteristics of the molding process. Compression molding, also known as compression molding, involves placing powdered, granular, fragmented, or fibrous plastic into a heated mold, heating it to melt it, and then using pressure to fill the mold cavity, forming a molded product with the same shape as the mold cavity.

[0003] Most existing compression molding equipment consists of an upper mold and a lower mold combined to form a mold cavity, in which plastic is molded. To facilitate demolding, some molding equipment is designed with a movable ejector structure on the mold. This structure will compromise the integrity of the mold. To meet the process requirements, the ejector structure and the mold need to fit together perfectly. However, even with sufficient precision, long-term operation of ejection will cause wear and tear, resulting in a larger gap between the mold and the ejector structure, leading to mold failure. This is especially true when processing plastic utensil products, where maintaining the integrity of the mold is crucial. However, without an ejector structure, demolding becomes difficult. Demolding by hand can easily cause burns, while wearing gloves makes it difficult to separate the product from the mold.

[0004] Therefore, there is an urgent need to design a compression molding equipment with ejection effect for the production of plastic products to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a molding equipment with ejection effect for the production of plastic products, so as to solve the problems mentioned in the background art, such as the trouble of demolding, the risk of burns from demolding by hand, and the difficulty of separating the product from the mold when operating with gloves.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a molding equipment for producing plastic products with an ejection effect, comprising a base, a guide rod, a second hydraulic cylinder, and a top seat, characterized in that: a guide rod is fixed to the outer surface of the base, a top seat is fixed to the top end of the guide rod, a molding seat is slidably connected to the outer surface of the guide rod, a second hydraulic cylinder is fixed to the outer surface of the top seat, and the output end of the second hydraulic cylinder is connected and fixed to the top end of the molding seat, an upper mold is fixed to the bottom end of the molding seat, a lower mold is fixed to the upper surface of the base, and ejection mechanisms are provided on both sides of the lower mold, the ejection mechanism comprising a fixed seat and a guide seat, and the fixed seat is embedded in the base.

[0007] Preferably, the flow guide seat is fixed to the surface of the fixed seat, one end of the flow guide seat is wedge-shaped, and the other end of the flow guide seat abuts against the side of the lower mold, the top of the lower mold is trapezoidal, and the bottom of the lower mold extends outward in all directions.

[0008] Preferably, the fixed base has a sliding block inside, and both sides of the sliding block are rotatably connected to a top rod via a hinge shaft. The end of the top rod away from the fixed base is rotatably connected to a support block via a hinge shaft, and the support block is movably connected to a top plate inside.

[0009] Preferably, one end of the top plate abuts against the inclined surface of the guide seat, and the other end of the top plate is rotatably connected to the support block via a connecting shaft. A torsion spring is sleeved on the outer surface of the connecting shaft, and the two ends of the torsion spring are respectively connected and fixed to the support block and the top plate. The lower surface of the top plate abuts against the inner wall of the support block.

[0010] Preferably, the lower surface of the support block away from the top rod is rotatably connected to a balance bar via a hinge shaft, and the end of the balance bar away from the support block is rotatably connected to a second connecting rod via a hinge shaft and rotatably connected to the inner wall of the top rod.

[0011] Preferably, a first hydraulic cylinder is fixed to the upper surface of the slide block, and a first connecting rod is fixed to the output end of the first hydraulic cylinder. The first connecting rod is L-shaped, and the end of the first connecting rod near the second connecting rod is rotatably connected to the second connecting rod through a hinge shaft.

[0012] Preferably, a first rack is fixed to the end of the first connecting rod away from the second connecting rod. The first rack is horizontal with the slide block. A groove is formed at the center of the upper surface of the slide block, and the first rack is located in the groove. Slide rails are integrally connected to both sides of the slide block. Slide grooves are formed on both sides of the inner wall of the fixed seat, and the slide rails are slidably connected to the slide grooves.

[0013] Preferably, a connecting cover is fixed to one end of the slide away from the guide seat. A driven gear and a driving gear are rotatably connected inside the connecting cover via a rotating shaft. The driven gear and the driving gear are arranged vertically and mesh with each other. The end of the driving gear away from the driven gear meshes with the lower surface of the first rack. A second rack is embedded in the bottom of the inner wall of the fixed seat, and the second rack meshes with the driven gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the molding equipment for producing plastic products with ejection effect adopts a side-hidden ejection mechanism, which facilitates rapid demolding and does not damage the integrity of the mold.

[0015] By installing ejection mechanisms on both sides of the lower mold, when the upper mold is raised, pushing the first connecting rod causes the second connecting rod and the first rack to move in the opposite direction to the lower mold. This causes the second connecting rod to pull the ejector rod to rotate clockwise, causing the support block to rise. At the same time, the first rack can drive the drive gear to rotate counterclockwise, causing the drive gear to drive the driven gear to rotate clockwise, thereby pushing the slide block to move in the direction of the lower mold. This allows the top plate to be inserted between the product and the lower mold while it is rising, ejecting the product from the lower mold. This achieves rapid demolding without damaging the integrity of the mold. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a front view schematic diagram of the structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 A partial structural schematic diagram of the ejector mechanism;

[0019] Figure 4 For the present invention Figure 3 A front view schematic diagram of the ejection mechanism.

[0020] Figure 5 For the present invention Figure 4 A front sectional view of the ejection mechanism;

[0021] Figure 6 For the present invention Figure 5 A side view of the structure of the middle slide.

[0022] In the diagram: 1. Base; 2. Guide rod; 3. Molding seat; 4. Upper mold; 5. Lower mold; 6. Ejection mechanism; 601. Fixed seat; 602. Flow guide seat; 603. Slide seat; 604. Ejector rod; 605. Support block; 606. Top plate; 607. Balance bar; 608. First hydraulic cylinder; 609. First connecting rod; 610. Second connecting rod; 611. First rack; 612. Connecting cover; 613. Driven gear; 614. Drive gear; 615. Second rack; 7. Second hydraulic cylinder; 8. Top seat. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-6 The present invention provides an embodiment of a molding equipment for producing plastic products with an ejection effect, comprising a base 1, a guide rod 2, a second hydraulic cylinder 7, and a top seat 8. The guide rod 2 is fixed to the outer surface of the base 1, and the top seat 8 is fixed to the top of the guide rod 2. A molding seat 3 is slidably connected to the outer surface of the guide rod 2, allowing the molding seat 3 to move more stably on the guide rod 2. The second hydraulic cylinder 7 is fixed to the outer surface of the top seat 8, and the output end of the second hydraulic cylinder 7 is connected and fixed to the top of the molding seat 3. An upper mold 4 is fixed to the bottom end of the molding seat 3, and a lower mold 5 is fixed to the upper surface of the base 1. Ejection mechanisms 6 are provided on both sides of the lower mold 5. The ejection mechanism 6 includes a fixed seat 601 and a guide seat 602, and the fixed seat 601 is embedded in the base 1.

[0025] Furthermore, such as Figure 1-2 As shown, the flow guide seat 602 is fixed on the surface of the fixed seat 601. One end of the flow guide seat 602 is wedge-shaped, and the other end of the flow guide seat 602 abuts against the side of the lower mold 5. The top of the lower mold 5 is trapezoidal, and the bottom of the lower mold 5 extends outward in all directions. This shape can be made into a bathtub-shaped product. The flow guide seat 602 and the bottom of the lower mold 5 abut against each other and are flush, which is conducive to guiding.

[0026] Furthermore, such as Figure 2-3 As shown, a slide block 603 is slidably connected inside the fixed base 601. Both sides of the slide block 603 are rotatably connected to a push rod 604 via a hinge shaft. The end of the push rod 604 away from the fixed base 601 is rotatably connected to a support block 605 via a hinge shaft. A top plate 606 is movably connected inside the support block 605. The movable connection makes it easier for the top plate 606 to be inserted between the product and the lower mold 5. Guided by the inclined surface of the guide seat 602, it is easier for the top plate 606 to be inserted between the product and the lower mold 5 after it is raised.

[0027] Furthermore, such as Figure 4-5 As shown, one end of the top plate 606 abuts against the inclined surface of the guide seat 602, and the other end of the top plate 606 is rotatably connected to the support block 605 via a connecting shaft. A torsion spring is sleeved on the outer surface of the connecting shaft, and the two ends of the torsion spring are respectively connected and fixed to the support block 605 and the top plate 606, so that the top plate 606 can always maintain its position when no external force is applied. Figure 4 In the indicated state, the lower surface of the top plate 606 abuts against the inner wall of the support block 605, thereby limiting the clockwise rotation of the top plate 606.

[0028] Furthermore, such as Figure 4-5As shown, the lower surface of the support block 605 away from the top rod 604 is rotatably connected to a balance bar 607 via a hinge shaft, and the end of the balance bar 607 away from the support block 605 is rotatably connected to a second connecting rod 610 via a hinge shaft and rotatably connected to the inner wall of the top rod 604, so that the support block 605 can always remain horizontal, while improving the stability of the support block 605 in raising and lowering.

[0029] Furthermore, such as Figure 4-5 As shown, a first hydraulic cylinder 608 is fixed on the upper surface of the slide block 603. A first connecting rod 609 is fixed to the output end of the first hydraulic cylinder 608. The first connecting rod 609 is L-shaped, and the end of the first connecting rod 609 near the second connecting rod 610 is rotatably connected to the second connecting rod 610 through a hinge shaft. The first hydraulic cylinder 608 can push and pull the second connecting rod 610, so that the second connecting rod 610 pulls the push rod 604 to rotate around the connection between the push rod 604 and the slide block 603, thereby realizing the lifting and lowering of the support block 605.

[0030] Furthermore, such as Figure 5 As shown, a first rack 611 is fixed to the end of the first connecting rod 609 away from the second connecting rod 610. The first rack 611 is horizontal with the slide 603. A groove is provided at the center of the upper surface of the slide 603, and the first rack 611 is located in the groove, which facilitates the hiding of the first rack 611 and does not affect the mounting of the first hydraulic cylinder 608 on the slide 603. Both sides of the slide 603 are integrally connected with slide rails. Both sides of the inner wall of the fixed seat 601 are provided with slide grooves. The slide rails and slide grooves are slidably connected, which facilitates the slide 603 to move left and right in the fixed seat 601.

[0031] Furthermore, such as Figure 5 As shown, a connecting cover 612 is fixed to one end of the slide 603 away from the guide seat 602. The connecting cover 612 and the slide 603 are designed as separate structures, which can be expanded into a modular design. The connecting cover 612, the driven gear 613 and the driving gear 614 are designed as a single component. The connecting cover 612 and the slide 603 can be connected by a quick-release structure. The driven gear 613 and the driving gear 614 of different sizes can be matched to control the travel speed of the slide 603, so as to match the lifting speed of the push rod 604 and achieve different ejection effects.

[0032] Inside the connecting cover 612, a driven gear 613 and a driving gear 614 are rotatably connected via a rotating shaft. The driven gear 613 and the driving gear 614 are arranged vertically and mesh with each other. The end of the driving gear 614 away from the driven gear 613 meshes with the lower surface of the first rack 611. The bottom of the inner wall of the fixed base 601 is embedded with a second rack 615, which meshes with the driven gear 613. The first rack 611 can drive the driving gear 614 to rotate, so that the driving gear 614 drives the driven gear 613 to rotate, thereby driving the slide 603 to move on the second rack 615.

[0033] Working principle: When in use, first connect the molding equipment with ejection effect for producing plastic products to an external power source through a wire, and then connect the first hydraulic cylinder 608 and the second hydraulic cylinder 7 to an external hydraulic pump through a conduit, so that the first hydraulic cylinder 608 and the second hydraulic cylinder 7 are provided with hydraulic power.

[0034] Next, the raw material is placed on the lower mold 5. The second hydraulic cylinder 7 is used to push the molding seat 3 down on the guide rod 2, which drives the upper mold 4 down to press on the lower mold 5, so that the raw material is squeezed and formed between the upper mold 4 and the lower mold 5.

[0035] Next, the second hydraulic cylinder 7 operates to lift the molding base 3. When the upper mold 4 is lifted, the first connecting rod 609 is pushed by the operation of 908, causing the first connecting rod 609 to drive the second connecting rod 610 and the first rack 611 to move in the opposite direction to the lower mold 5. The second connecting rod 610 pulls the push rod 604 to rotate clockwise, causing the support block 605 to rise. At the same time, the first rack 611 can drive the drive gear 614 to rotate counterclockwise, causing the drive gear 614 to drive the driven gear 613 to rotate clockwise, thereby pushing the slide 603 to move in the direction of the lower mold 5. As the top plate 606 is lifted, it can be inserted between the product and the lower mold 5, pushing the product out of the lower mold 5. At this time, the product has been demolded, and the operator can easily remove the product from the lower mold 5. When used with a robotic arm, it can also realize automatic production.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A molding device with ejection effect for plastic product production, comprising a base (1), a guide rod (2), a second hydraulic oil cylinder (7) and a top base (8), characterized in that: The outer surface of the base (1) is fixed with a guide rod (2), the top end of the guide rod (2) is fixed with a top seat (8), the outer surface of the guide rod (2) is slidably connected with a die pressing seat (3), the outer surface of the top seat (8) is fixed with a second hydraulic oil cylinder (7), and the output end of the second hydraulic oil cylinder (7) is fixedly connected with the top end of the die pressing seat (3), the bottom end of the die pressing seat (3) is fixed with an upper die (4), the upper surface of the base (1) is fixed with a lower die (5), both sides of the lower die (5) are provided with an ejection mechanism (6), the ejection mechanism (6) comprises a fixed seat (601) and a flow guide seat (602), and the fixed seat (601) is embedded on the base (1). The flow guide seat (602) is fixed on the surface of the fixed seat (601), one end of the flow guide seat (602) is wedge-shaped, and the other end of the flow guide seat (602) abuts against the side edge of the lower die (5), the top of the lower die (5) is trapezoidal, and the bottom of the lower die (5) extends outward in all directions. The inside of the fixed seat (601) is slidably connected with a sliding seat (603), both sides of the sliding seat (603) are rotatably connected with a top rod (604) through a hinge shaft, one end of the top rod (604) away from the fixed seat (601) is rotatably connected with a supporting block (605) through a hinge shaft, and the inside of the supporting block (605) is movably connected with a top plate (606). One end of the top plate (606) abuts against the inclined surface of the flow guide seat (602), and the other end of the top plate (606) is rotatably connected with the supporting block (605) through a connecting shaft, a torsional spring is sleeved on the outer surface of the connecting shaft, and both ends of the torsional spring are fixedly connected with the supporting block (605) and the top plate (606), respectively, and the lower surface of the top plate (606) abuts against the inner wall of the supporting block (605).

2. The molding apparatus with ejection effect for plastic product manufacturing according to claim 1, wherein: The lower surface of the supporting block (605) is rotatably connected with a balance rod (607) through a hinge shaft away from the top rod (604), and one end of the balance rod (607) away from the supporting block (605) is rotatably connected with a second connecting rod (610) and rotatably connected with the inner wall of the top rod (604).

3. The molding apparatus having an ejection effect for plastic product manufacturing according to claim 2, wherein: The upper surface of the sliding seat (603) is fixed with a first hydraulic oil cylinder (608), the output end of the first hydraulic oil cylinder (608) is fixed with a first connecting rod (609), the first connecting rod (609) is "L"-shaped, and one end of the first connecting rod (609) close to the second connecting rod (610) is rotatably connected with the second connecting rod (610) through a hinge shaft.

4. The molding apparatus having an ejection effect for plastic product manufacturing according to claim 3, wherein: One end of the first connecting rod (609) away from the second connecting rod (610) is fixed with a first rack (611), the first rack (611) is horizontal to the sliding seat (603), a recess is formed in the center of the upper surface of the sliding seat (603), and the first rack (611) is located in the recess, and both sides of the sliding seat (603) are integrally connected with sliding rails, and the inner walls of the fixed seat (601) are provided with sliding grooves, and the sliding rails and the sliding grooves are slidably connected.

5. The molding apparatus with ejection effect for plastic product manufacturing according to claim 4, wherein: The end, away from the flow guide base (602), of the sliding base (603) is fixed with a connecting cover (612), the inside of the connecting cover (612) is rotationally connected with a driven gear (613) and a driving gear (614) through a rotating shaft, the driven gear (613) and the driving gear (614) are arranged in an up-down mode and are engaged, one end of the driving gear (614), away from the driven gear (613), is engaged with the lower surface of the first gear rack (611), and the inner wall bottom of the fixed base (601) is embedded with a second gear rack (615), and the second gear rack (615) is engaged with the driven gear (613).

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