Centrifugal tube injection mold convenient to demold

Abstract

The centrifugal tube injection mold convenient to demold comprises a lower mold block, an upper mold block and a demolding mechanism, a plurality of sets of forming cavities are formed in the top of the lower mold block and distributed in a linear array mode, and the demolding mechanism is composed of an electric push rod, a transverse plate, an end plate, a lifting disc and an ejector rod. Containing grooves are formed in the four corners of the outer side of the lower die block, one electric push rod is installed on the inner top face of each containing groove in an inverted hanging mode, a first moving groove is formed under each set of forming cavities, and second moving grooves are formed in the two sides of the lower die block. The core mold rod is arranged at the bottom of the upper mold block, the core mold rod can be driven to be separated from the interior of the forming cavity when the upper mold block is lifted, so that an injection molding part is naturally separated from the lower mold plate, the injection molding part is retained in the forming cavity, and then the injection molding part is jacked up by the demolding mechanism, so that the injection molding part is conveniently taken out; and rapid demolding is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for centrifuge tube injection molding which is easy to demould. Background Art

[0002] A centrifuge tube is a closed cylindrical test tube, usually made of acid-resistant and alkali-resistant plastic materials such as polypropylene or polyethylene. Centrifuge tubes are a common test tube in laboratories, and their main purpose is centrifugal separation and sample storage. Centrifugal separation is to separate the samples in a mixed liquid into different layers under the action of centrifugal force according to the different density of the samples. Centrifuge tubes can help to stratify and separate the samples. At the same time, centrifuge tubes can also be used as storage containers for samples for short-term or long-term cryopreservation of biological samples. Centrifuge tubes are widely used in the fields of life sciences, medicine, and industry. The manufacture of centrifuge tubes generally adopts the injection molding processing method. During injection molding, the molten plastic is injected into the cavity of the injection mold through the runner and cooled to form.

[0003] When some existing centrifuge tube injection molds are in use, the centrifuge tube will be sleeved on the outside of the core mold after being formed, which makes it inconvenient to remove the centrifuge tube and is not conducive to rapid demoulding.

[0004] For example, a centrifuge tube injection mold disclosed in announcement number CN215472727U can inject molten plastic into the injection cavity through a plurality of injection holes, so the flow of the plastic is more uniform, making it less likely for the plastic to aggregate, and therefore less likely for convex spots to form on the product. It is easy to ensure the uniformity of the wall thickness of the centrifuge tube, thereby ensuring the performance of the centrifuge tube and facilitating the processing of the centrifuge tube.

[0005] However, after the centrifuge tube is injection molded in the injection mold of the patent, the centrifuge tube is sleeved on the outer side of the core mold, which is inconvenient to remove the centrifuge tube and is not conducive to rapid demoulding.

[0006] Therefore, it is necessary to invent a centrifuge tube injection molding mold that is convenient for demoulding to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a centrifuge tube injection mould which is easy to demould, so as to solve the above-mentioned technical problems.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a centrifuge tube injection molding mold that is easy to demold, comprising a lower module, an upper module and a demolding mechanism, the top of the lower module is provided with a molding cavity, the molding cavity is provided in multiple groups, and the multiple groups of molding cavities are distributed in a linear array, the demolding mechanism is composed of an electric push rod, a cross plate, an end plate, a lifting plate and a push rod, the four corners of the outer side of the lower module are provided with accommodating grooves, and the top surface of each accommodating groove is invertedly installed with an electric push rod, and a movable groove No. 1 is provided directly below each group of the molding cavities, and the lower mold A No. 2 movable groove is provided on both sides of the block, and the accommodating groove, the No. 1 movable groove and the No. 2 movable groove are connected to each other. The cross plate is arranged inside the No. 1 movable groove, and the end plate is arranged inside the No. 2 movable groove. Both ends of the cross plate are fixedly connected to the two end plates respectively, and the bottom end of the electric push rod extends to the inside of the No. 2 movable groove and is fixedly connected to the end plate. A lifting plate is provided on the bottom surface of each of the forming cavities, and a push rod is fixedly connected to the bottom of the lifting plate. The bottom end of the push rod passes through the forming cavity and extends to the inside of the No. 1 movable groove, and the bottom end of the push rod is fixedly connected to the cross plate.

[0009] The electric push rod is set upside down. When the electric push rod contracts, it can drive the demoulding mechanism to lift the injection molded part.

[0010] Preferably, the upper module is arranged directly above the lower module, and a core mold rod is fixedly connected to the bottom of the upper module, and the core mold rod matches the molding cavity.

[0011] After the upper and lower molds are closed, the core mold rod is inserted into the molding cavity. When the molten raw material enters the molding cavity, it will cool and form around the core mold rod, and finally form a centrifuge tube injection molded part.

[0012] Preferably, a gate is provided at the top of the upper module, a main flow channel is provided at the bottom of the gate, and branch flow channels are provided around the bottom of the main flow channel.

[0013] The molten raw material is injected into the molding cavity through the gate, main channel and branch channel.

[0014] Preferably, the gate and the main flow channel are both opened directly above the core mold rod, and the branch flow channel is connected to the molding cavity.

[0015] The runner can guide the raw material to be evenly injected into the molding cavity.

[0016] Preferably, a fixed base plate is fixedly connected to the bottom of the lower module, and a No. 1 mounting hole is provided at each of the four corners of the fixed base plate.

[0017] The lower module can be conveniently fixed on the workbench by fixing the base plate.

[0018] Preferably, both sides of the upper module are fixedly connected with fixed ear plates, and four corners of the fixed ear plates are provided with No. 2 mounting holes.

[0019] The upper module can be conveniently fixed to the bottom of the mold clamping device by fixing the ear plate.

[0020] Preferably, the transverse plate can slide up and down along the No. 1 movable groove, the end plate can slide up and down along the No. 2 movable groove, and the lifting plate can slide up and down along the forming cavity.

[0021] The end plate and the cross plate are pulled upward by the electric push rod, thereby driving the top rod to push the lifting plate upward.

[0022] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0023] By setting the core mold rod at the bottom of the upper module, the core mold rod can be driven to detach from the molding cavity when the upper module is lifted, so that the injection molded part and the lower template are naturally separated, and the injection molded part will be retained in the molding cavity. The demolding mechanism is then used to lift the injection molded part upward, making it easy to take out the injection molded part and facilitating rapid demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model when the upper and lower molds are closed;

[0025] Figure 2 This is a schematic diagram of the overall structure of the utility model when the upper and lower molds are opened;

[0026] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0027] Figure 4 It is a partial structural schematic diagram of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the demoulding mechanism of the utility model.

[0029] Description of reference numerals:

[0030] 1. Lower module; 2. Upper module; 3. Molding cavity; 4. Electric push rod; 5. Horizontal plate; 6. End plate; 7. Lifting plate; 8. Ejector rod; 9. Core mold rod; 10. Gate; 11. Main channel; 12. Branch channel; 13. Fixed base plate; 14. Fixed ear plate. DETAILED DESCRIPTION

[0031] 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 in conjunction with the accompanying drawings.

[0032] The utility model provides Figure 1-5The mold for centrifuge tube injection molding, which is easy to demould, comprises a lower module 1, an upper module 2 and a demoulding mechanism. A molding cavity 3 is provided on the top of the lower module 1. The molding cavity 3 is provided in multiple groups. The multiple groups of molding cavities 3 are distributed in a linear array. The demoulding mechanism is composed of an electric push rod 4, a cross plate 5, an end plate 6, a lifting plate 7 and a push rod 8. Receiving grooves are provided at the four corners of the outer side of the lower module 1. An electric push rod 4 is invertedly installed on the top surface of each receiving groove. A moving groove No. 1 is provided directly below each group of molding cavities 3. Two moving grooves are provided on both sides of the lower module 1. No. 1 movable groove, the accommodating groove, the No. 1 movable groove and the No. 2 movable groove are connected, the cross plate 5 is arranged inside the No. 1 movable groove, the end plate 6 is arranged inside the No. 2 movable groove, the two ends of the cross plate 5 are respectively fixedly connected with the two end plates 6, the bottom end of the electric push rod 4 extends to the inside of the No. 2 movable groove and is fixedly connected to the end plate 6, a lifting plate 7 is arranged on the bottom surface of each forming cavity 3, a push rod 8 is fixedly connected to the bottom of the lifting plate 7, the bottom end of the push rod 8 passes through the forming cavity 3 and extends to the inside of the No. 1 movable groove, and the bottom end of the push rod 8 is fixedly connected to the cross plate 5.

[0033] In one aspect of the present embodiment, the upper module 2 is arranged directly above the lower module 1, and a core mold rod 9 is fixedly connected to the bottom of the upper module 2, and the core mold rod 9 matches the molding cavity 3. A gate 10 is opened at the top of the upper module 2, and a main channel 11 is opened at the bottom of the gate 10. Branch channels 12 are opened around the bottom of the main channel 11. The gate 10 and the main channel 11 are both opened directly above the core mold rod 9, and the branch channel 12 is connected to the molding cavity 3. A fixed base plate 13 is fixedly connected to the bottom of the lower module 1, and a No. 1 mounting hole is opened at the four corners of the fixed base plate 13. Fixed ear plates 14 are fixedly connected on both sides of the upper module 2, and a No. 2 mounting hole is opened at the four corners of the fixed ear plate 14. The cross plate 5 can slide up and down along the No. 1 movable groove, the end plate 6 can slide up and down along the No. 2 movable groove, and the lifting plate 7 can slide up and down along the molding cavity 3.

[0034] Working principle of this utility model:

[0035] Refer to the instruction manual Figure 1-5 When using the utility model, first fix the lower module 1 on the workbench by fixing the base plate 13, fix the upper module 2 to the bottom of the mold clamping device by fixing the ear plate 14, push the upper module 2 downward by the mold clamping device to complete the mold clamping with the lower module 1, dock the feeding device with the gate 10, and inject molten raw materials into the gate 10 through the feeding device. The raw materials pass through the main channel 11 and the branch channel 12 in turn and finally flow into the molding cavity 3 until the raw materials fill the molding cavity 3. After standing for a period of time, wait until the raw materials are cooled and formed in the molding cavity 3;

[0036] When opening the mold, the upper module 2 is pulled upward by the mold closing device until the upper module 2 is completely separated from the lower module 1. At this time, the core mold rod 9 is detached from the inside of the molding cavity 3, while the centrifuge tube injection molded part is retained in the molding cavity 3. The electric push rod 4 is started, and the end plate 6 and the cross plate 5 are pulled upward by the electric push rod 4, thereby driving the top rod 8 to push the lifting plate 7 upward, thereby lifting the centrifuge tube injection molded part, so that the top end of the centrifuge tube injection molded part extends outward from the inside of the molding cavity 3, which is convenient for taking out the centrifuge tube injection molded part and is conducive to rapid demolding.

Claims

1. A centrifuge tube injection mold that is easy to demould, comprising a lower module (1), an upper module (2) and a demoulding mechanism, characterized in that: The top of the lower module (1) is provided with a molding cavity (3), and the molding cavity (3) is arranged in a plurality of groups. The plurality of groups of molding cavities (3) are distributed in a linear array. The demoulding mechanism is composed of an electric push rod (4), a horizontal plate (5), an end plate (6), a lifting plate (7) and a push rod (8). The four corners of the outer side of the lower module (1) are provided with a receiving groove, and an electric push rod (4) is invertedly installed on the top surface of each receiving groove. A No. 1 moving groove is provided directly below each group of the molding cavities (3), and a No. 2 moving groove is provided on both sides of the lower module (1). The receiving groove, the No. 1 moving groove and the No. 2 moving groove are The three grooves are interconnected, the transverse plate (5) is arranged inside the No. 1 movable groove, the end plate (6) is arranged inside the No. 2 movable groove, the two ends of the transverse plate (5) are respectively fixedly connected to the two end plates (6), the bottom end of the electric push rod (4) extends to the inside of the No. 2 movable groove and is fixedly connected to the end plate (6), and a lifting plate (7) is arranged on the bottom surface of each molding cavity (3), and a top rod (8) is fixedly connected to the bottom of the lifting plate (7), and the bottom end of the top rod (8) passes through the molding cavity (3) and extends to the inside of the No. 1 movable groove, and the bottom end of the top rod (8) is fixedly connected to the transverse plate (5).

2. The centrifuge tube injection molding mold that is easy to demould according to claim 1, characterized in that: The upper module (2) is arranged directly above the lower module (1), and a core mold rod (9) is fixedly connected to the bottom of the upper module (2), and the core mold rod (9) matches the molding cavity (3).

3. The centrifuge tube injection molding mold that is easy to demould according to claim 2, characterized in that: The top of the upper module (2) is provided with a gate (10), the bottom of the gate (10) is provided with a main flow channel (11), and the bottom of the main flow channel (11) is provided with branch flow channels (12) around it.

4. The centrifuge tube injection molding mold that is easy to demould according to claim 3, characterized in that: The gate (10) and the main flow channel (11) are both opened directly above the core mold rod (9), and the branch flow channel (12) is connected to the molding cavity (3).

5. The centrifuge tube injection molding mold that is easy to demould according to claim 1, characterized in that: A fixed base plate (13) is fixedly connected to the bottom of the lower module (1), and four corners of the fixed base plate (13) are provided with a No. 1 mounting hole.

6. The centrifuge tube injection molding mold that is easy to demould according to claim 1, characterized in that: Both sides of the upper module (2) are fixedly connected with fixed ear plates (14), and four corners of the fixed ear plates (14) are provided with No. 2 mounting holes.

7. The centrifuge tube injection molding mold that is easy to demould according to claim 1, characterized in that: The transverse plate (5) can slide up and down along the No. 1 moving groove, the end plate (6) can slide up and down along the No. 2 moving groove, and the lifting plate (7) can slide up and down along the molding cavity (3).

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